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REVIEW 4 major objections 5 minor 66 references

This paper claims that in lead-free ferrite–titanate composites, the magnetoelectric coefficient is maximized at 30% ferrite sintered at 1200 °C, reaching about 1.28 mV/cm·Oe via strain-mediated coupling.

Reviewed by Pith at T0; open to challenge. T0 means a machine referee read the full paper against a public rubric. the ladder, T0–T4 →

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A 30% Ti-doped cobalt ferrite–70% barium titanate composite sintered at 1200 °C gives the highest magnetoelectric coefficient (~1.28 mV/cm.Oe) of the compositions tested.

T0 review reviewed 2026-08-01 challenge →

load-bearing objection A plausible, internally consistent parameter sweep of a known composite family; the headline ME value is not guarded against leakage artifacts, so the ranking should be treated as provisional. the 4 major comments →

arxiv 2607.27717 v1 pith:QA47DEIW submitted 2026-07-30 cond-mat.mtrl-sci cond-mat.str-el

Optimization of magneto-electric properties in Lead-free (x)Co1.2Ti0.2Fe1.6O4 - (100-x)BaTiO3 based composites

Rajeev Dwivedi , Samanway Mohanta , Ashutosh Anand , Abhinash Tripathy , Najnin Bano , Dharmendra Kumar , Hemant Singh , R. Venkatesh
show 2 more authors
Sachin Gupta Dinesh Kumar Shukla
This is my paper
classification cond-mat.mtrl-sci cond-mat.str-el PACS 75.85.+t
keywords magnetoelectric couplinglead-free multiferroic compositeCo1.2Ti0.2Fe1.6O4-BaTiO3solid-state reactionsintering temperaturestrain-mediated couplingmagnetoelectric voltage coefficient
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved

The pith

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The reading

This paper tries to establish that the magnetoelectric response of lead-free composites made of Ti-doped cobalt ferrite and barium titanate can be tuned by choosing both the ferrite fraction and the sintering temperature, and that the best measured response occurs at 30% ferrite and 1200 °C: a magnetoelectric voltage coefficient of about 1.28 mV/cm·Oe. The authors explain this through strain-mediated coupling, in which magnetostrictive deformation of the ferrite is transferred elastically to the piezoelectric titanate and generates a voltage, and they argue that coupling is strongest when the product of piezoelectric and piezomagnetic coefficients and interfacial coupling efficiency is optimal, not when either phase is individually at its best. A sympathetic reader would care because the result points to processing conditions, not new chemistries, as a practical route toward lead-free multiferroic devices.

Core claim

The central claim is that the composite with 30 wt% Co1.2Ti0.2Fe1.6O4 and 70 wt% BaTiO3, sintered at 1200 °C, exhibits the highest magnetoelectric voltage coefficient among the six studied combinations, αME ≈ 1.28 mV/cm·Oe. The authors attribute this to a strain-mediated mechanism: the magnetostrictive ferrite deforms in a magnetic field, that strain passes elastically to the piezoelectric titanate, and a voltage appears across the sample. They argue that αME is maximized not when individual polarization or magnetization is highest, but when the product of piezoelectric coefficient d, piezomagnetic coefficient q, and interfacial coupling efficiency k is optimized; the 1200 °C sintering impro

What carries the argument

The load-bearing identity is the magnetoelectric voltage coefficient αME = Vout/(Hac·t), measured with a lock-in technique, together with the product relation αME ∝ d·q·k. Here d is the piezoelectric coefficient of BaTiO3, q = dλ/dH is the piezomagnetic coefficient of the ferrite (change of magnetostriction with applied field), and k is the interfacial coupling efficiency between the phases. The argument works by showing that αME tracks neither d nor q separately but their balanced combination with k, and that higher sintering temperature raises k through denser microstructure.

Load-bearing premise

The argument rests on the measured voltage across the poled sample being a genuine piezoelectric response to magnetostrictive strain; the paper reports lossy polarization and leakage currents up to ~10⁻⁴ A/cm² but provides no control measurement to rule out leakage or capacitive pickup.

What would settle it

Measure αME on an unpoled composite and on a ferrite-only pellet with the same electrode geometry: if either gives a comparable lock-in voltage, the strain-mediated interpretation is not supported. Alternatively, check the phase of Vout relative to Hac; a true piezoelectric signal should be tied to the strain, not to the leakage current, and should vanish when the sample is heated above the Curie temperature of BaTiO3 while the ferrite is still magnetostrictive.

Watch this falsifier. Get emailed when new claim-graph text bears on it.

If this is right

  • Higher sintering temperature (1200 °C over 1100 °C) raises αME for all three compositions, so densification is a general lever for improving interfacial strain transfer in this composite family.
  • Because the best composite is not the one with the highest polarization or magnetization, device optimization should target the combined d·q·k product rather than individual phase figures of merit.
  • The measured range of 0.52–1.28 mV/cm·Oe provides a quantitative baseline for comparing future lead-free bulk particulate composites.
  • The low-frequency (23 Hz) magnetoelectric response supports potential use in magnetic-field sensors and low-power energy harvesters, as the paper states.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • The paper does not present error bars or unpoled controls for αME, so an editorial inference is that the 0.64→1.28 improvement for C30:B70 with sintering temperature should be re-tested on several poled samples before being treated as robust.
  • The XRD traces show a weak secondary phase that the authors suggest may aid strain transfer; a testable extension not carried out here is to deliberately grow a thin interfacial layer of that phase and see whether k, and hence αME, rises further.
  • If leakage contaminates the lock-in voltage, then reducing leakage—for example by better insulating grain boundaries—should raise αME; this is a prediction the paper does not explicitly make.
  • A 40% ferrite composite sintered at 1200 °C would test the 'optimal balance' claim: the model predicts αME should drop as leakage and ferroelectric dilution overtake the added magnetostrictive drive.
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Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit.

Referee Report

4 major / 5 minor

Summary. The paper reports a systematic study of lead-free (x)Co1.2Ti0.2Fe1.6O4-(100-x)BaTiO3 composites (x = 10, 20, 30) sintered at 1100 °C and 1200 °C, combining structural (XRD/Rietveld, SEM), dielectric, ferroelectric, magnetic, and magnetoelectric (ME) characterization. The central claim is that the C30:B70 composite sintered at 1200 °C shows the highest ME coefficient, ~1.28 mV/cm.Oe, attributed to an optimal balance between magnetostrictive and piezoelectric contributions and improved interfacial coupling. The compositional and sintering-temperature trends in density, dielectric constant, polarization, magnetization, and reported ME coefficient are internally consistent, but the quantitative ME ranking is not protected against non-piezoelectric measurement artifacts.

Significance. If the reported ME coefficients are genuine strain-mediated voltages, the study provides a useful mapping of composition and sintering-temperature effects in a lead-free CFO-BTO-type system, with supporting structural and microstructural characterization. The manuscript is largely descriptive, but the systematic two-variable (composition, sintering temperature) dataset and the explicit use of a direct lock-in measurement of αME are strengths. However, the central quantitative claim rests entirely on one measurement channel that lacks artifact controls, so the significance for device-oriented conclusions is currently conditional. The work is appropriate for a ceramics/materials journal if the measurement validation is supplied.

major comments (4)
  1. [§3.6, Eq. (iii), Fig. 10, Table 1] The central claim—the ranking of αME and the 'optimal balance' interpretation—depends on αME = Vout/(Hac·t) being a true piezoelectric response to magnetostrictive strain. The manuscript itself documents conditions that put this in doubt: Section 3.4 reports lossy, unsaturated P-E loops due to leakage, and Fig. 8 shows leakage current densities up to ~1.2×10⁻⁴ A/cm². With such a conductive/lossy sample and silver electrodes, spurious lock-in voltages can arise from magnetostriction-induced electrode vibration, eddy currents, magnetoresistance, or capacitive pickup. No unpoled-sample control, no poling-reversal sign check, no lock-in phase information, and no frequency-dependence test are reported. Without these, the quantitative values in Table 1 and the interpretation in Section 3.6 are unsupported.
  2. [Table 1; Figs. 4–10] No error bars or uncertainty estimates are reported for any measured quantity. The αME differences among compositions at 1100 °C (0.52, 0.59, 0.64 mV/cm.Oe) may be within experimental scatter; repeated measurements on independently prepared pellets are needed to establish that the ranking is significant. Similarly, Ps, Pr, Ms, Mr, and dielectric data are given as single values. The absence of uncertainties undermines the quantitative comparison that the conclusions rely on.
  3. [§3.6, Eq. (iv)] The explanation αME ∝ qdk is used to interpret the maximum at C30:B70_1200°C, but q (piezomagnetic coefficient), d (piezoelectric coefficient), and k (interfacial coupling efficiency) are not independently measured or extracted. As written, the statement that 'maximum ME coupling occurs when qdk is optimized' is a post-hoc explanation rather than a tested mechanism. The authors should either provide independent measurements of d and q (or k) for the composites or soften the mechanistic claim to avoid the appearance of circular reasoning.
  4. [§3.1, Fig. 1(c)] The paper proposes that the interfacial secondary phase BaFe12O19 'may facilitate strain-mediated coupling and contribute positively to the overall ME response.' However, no evidence links the amount or distribution of this secondary phase to the observed αME values. If this is part of the interpretation, it needs support (e.g., quantitative phase analysis, comparison with a sample without this phase, or direct correlation with αME); otherwise it should be labeled as a speculation.
minor comments (5)
  1. [Table 1] The units for Ps and Pr are given as mC/cm²; these should be μC/cm², consistent with the text and Fig. 7 (μC/cm²).
  2. [§3.6] The statement that 'maximum ME coupling in both cycles indicates strain-mediated coupling' is not justified; the asymmetric field dependence of αME can be explained by magnetic hysteresis alone and does not by itself prove the strain mechanism.
  3. [Table 2] The literature comparison lists αME values measured at different Hdc, frequencies, and sample geometries. A direct comparison of magnitudes without these conditions being controlled is misleading; the relevant experimental conditions should be stated in the table or a caveat added.
  4. [§3.1] The text says 'Fig. 1 shows ... Rietveld refined patterns of the individual phases of CTFO and BTO,' but Fig. 1(a,b) are refined patterns of pure BTO and pure CTFO, not the composite phases. Please clarify.
  5. [§3.3.1] The term 'relaxer' should be 'relaxor' (also appears as 'relaxer-like' later in the same section).

Circularity Check

0 steps flagged

No significant circularity: the central ME coefficients are direct measurements, and the explanatory formula is not fitted to the data.

full rationale

The paper's central claim—that C30:B70 sintered at 1200 °C exhibits the highest αME (~1.28 mV/cm.Oe)—rests on direct lock-in measurements processed through Eq. (iii), αME = Vout/(Hac·t), which is a standard definition of the ME voltage coefficient, not a fitted or predicted quantity. The explanatory expression αME ∝ qdk (Eq. iv) is used only to interpret the measured ranking; q, d, and k are not extracted from the data and no prediction is computed from them. No parameter is fitted to a subset of the αME values and then used to predict another subset. The self-citations (refs [36,62] from the same group) appear only as literature context and comparison data in Table 2, and are not load-bearing for the derivation. The lack of unpoled-sample controls or phase-sensitive verification is a measurement-validity issue, not a circularity issue, because it does not make the measured αME equivalent to an input assumption. Thus no circular step is present.

Axiom & Free-Parameter Ledger

0 free parameters · 3 axioms · 0 invented entities

All reported values (αME, Ps, Ms, ε′, etc.) are direct measurements, so the central claim introduces no fitted free parameters. The epistemic load is carried by two external/unsupported assumptions: the unmeasured magnetostrictive benefit of Ti doping (cited from other groups) and the speculative positive role of BaFe12O19. The standard q·d·k coupling model is used only for interpretation.

axioms (3)
  • domain assumption Ti4+ substitution at octahedral B-sites of CoFe2O4 reduces magnetization but increases magnetostriction and strain sensitivity (dλ/dH).
    Invoked in Section 3.5 and Conclusions to explain why CTFO is a good magnetostrictive phase; magnetostriction is not directly measured here, only inferred from refs [20,38–41].
  • ad hoc to paper The interfacial secondary phase BaFe12O19 may facilitate strain-mediated coupling and contribute positively to the ME response.
    Proposed in Section 3.1 with no direct supporting evidence; the paper states 'we propose that this interfacial phase may facilitate the strain-mediated coupling'.
  • domain assumption αME is governed by the product of piezoelectric coefficient d, piezomagnetic coefficient q, and interfacial coupling factor k (Eq. iv), so the maximum occurs at an optimal phase balance.
    Standard strain-mediated composite model (ref. [61]) used to interpret the observed maximum at x = 30; d, q, and k are not measured independently.

reviewed 2026-08-01 · how reviews work

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Cite this review

Pith. "Pith review of Optimization of magneto-electric properties in Lead-free (x)Co1.2Ti0.2Fe1.6O4 - (100-x)BaTiO3 based composites." pith.science (2026). https://pith.science/paper/QA47DEIW

@misc{pith2026260727717,
  author       = {Pith},
  title        = {Pith review of: Optimization of magneto-electric properties in Lead-free (x)Co1.2Ti0.2Fe1.6O4 - (100-x)BaTiO3 based composites},
  year         = {2026},
  howpublished = {\url{https://pith.science/paper/QA47DEIW}},
  note         = {Machine review of arXiv:2607.27717}
}
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read the original abstract

This work presents a systematic study of lead-free multiferroic composites of (x)Co1.2Ti0.2Fe1.6O4 - (100-x)BaTiO3 (x = 10, 20, 30), which were synthesized by a solid-state reaction method to investigate the effects of composition and sintering temperature on their structural , electrical, magnetic, and magnetoelectric (ME) properties. X-ray diffraction along with Rietveld refinement confirms the coexistence of tetragonal BaTiO3 (BTO) and cubic spinel Co1.2Ti0.2Fe1.6O4 (CTFO) phases. Microstructural analysis shows that densification and grain growth are better at higher sintering temperatures, leading to better coupling between the two phases. Dielectric and ferroelectric studies indicate lossy polarization-electric field (P-E) behaviour due to leakage from the conductive phase, while magnetic properties show increased magnetization with increasing ferrite content. All composites exhibit ME coefficients, which depend on the composition and sintering conditions; the highest ME coefficient (~1.28 mV/cm.Oe) was observed for the 30CTFO - 70BTO composite sintered at 1200 {\deg}C. This improvement is due to the optimal balance between magnetostrictive and piezoelectric responses and improved interfacial strain transfer. These results demonstrate that simultaneous optimization of dopant-modified composition and sintering conditions is essential for achieving improved magnetoelectric coupling in bulk multiferroic composites. Moreover, the results demonstrate the potential of lead-free composites for multifunctional device applications in next-generation, low-power technologies, including high-density non-volatile memory (e.g. FeRAM/MRAM), magnetic field sensors, spintronic devices, and actuators.

Figures

Figures reproduced from arXiv: 2607.27717 by Abhinash Tripathy, Ashutosh Anand, Dharmendra Kumar, Dinesh Kumar Shukla, Hemant Singh, Najnin Bano, Rajeev Dwivedi, R. Venkatesh, Sachin Gupta, Samanway Mohanta.

Figure 2
Figure 2. Figure 2: XRD patterns along with Rietveld refinement for CTFO [PITH_FULL_IMAGE:figures/full_fig_p007_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: FE-SEM micrographs of CTFO–BTO composites: C10:B90, C20:B80, and C30:B70 sintered at 1100 °C (a–c) and 1200 °C (d–f), along with corresponding grain size distribution histograms (g–l). 3.3 Dielectric properties Dielectric measurements were conducted using the parallel capacitor principle. The dielectric properties of all composites were studied by evaluating the frequency dependent capacitance (C) and diel… view at source ↗
Figure 6
Figure 6. Figure 6: Nyquist plots (Z ′′ vs Z ′ ) of CTFO–BTO composites sintered at 1100 °C and 1200 °C, measured at selected temperatures (a) 300 K, (b) 400 K, (c) 450 K, and (d) 500 K. The Nyquist plots of (Z ′ and Z ′′) of composite (x)Co1.2Ti0.2Fe1.6O4 - (100-x) BaTiO3 x= 10, 20, 30 and sintered at 1100 °C and 1200 °C a wide range of frequency 5 Hz-1 MHz at four different temperatures 300 K, 400 K, 450 K, and 500 K are sh… view at source ↗
Figure 7
Figure 7. Figure 7: The electric field dependence of polarization for (a) (x)CTFO – (100-x)BTO (b) for BTO, measured at room temperature. Composition dependence of (c) saturation polarization and (d) remnant polarization as a function of sintering temperature. Pure BTO exhibits a lower coercive, high saturation polarization and remanent polarization field compared to the CTFO-BTO composites, as evident in [PITH_FULL_IMAGE:fi… view at source ↗

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Works this paper leans on

66 extracted references · 1 canonical work pages

  1. [1]

    Experimental details Magnetoelectric composites constituting Ti -substituted CoFe 2O4 as a ferromagnetic and BaTiO3 as ferroelectric phase were synthesized via solid state reaction method. Co3O4, Fe2O3, and TiO2 (these are ~99.9% purity) powders were precisely weighed in their stoichiometry ratios and thoroughly mixed using an agate mortar and pestle for ...

    2026

  2. [2]

    Results and discussions 3.1 Structural properties Fig. 1. Rietveld-refined X-ray diffraction patterns for (a) pure BTO, and (b) pure CTFO. (c) XRD patterns of pristine CTFO-BTO and composites [(x) Co1.2Ti0.2Fe1.6O4 - (100-x) BaTiO3 x= 10, 20, 30] at room temperature. Fig. 1 shows the room -temperature X -ray diffraction (XRD) patterns of all [(x) Co1.2Ti0...

    2026

  3. [3]

    The physics of magnetoelectric composites,

    R. Grössinger, G. V. Duong, and R. Sato -Turtelli, “The physics of magnetoelectric composites,” J. Magn. Magn. Mater., vol. 320, no. 14, pp. 1972–1977, 2008

    1972

  4. [4]

    Multiferroics: Progress and prospects in thin films,

    R. Ramesh and N. A. Spaldin, “Multiferroics: Progress and prospects in thin films,” Nanosci. Technol. A Collect. Rev. from Nat. Journals, vol. 3, pp. 20–28, 2009

    2009

  5. [5]

    Multiferroic magnetoelectric composites: Historical perspective, status, and future directions,

    C. W. Nan, M. I. Bichurin, S. Dong, D. Viehland, and G. Srinivasan, “Multiferroic magnetoelectric composites: Historical perspective, status, and future directions,” J. Appl. Phys., vol. 103, no. 3, 2008

    2008

  6. [6]

    Introduction to magnetoelectric coupling and multiferroic films,

    G. Lawes and G. Srinivasan, “Introduction to magnetoelectric coupling and multiferroic films,” J. Phys. D. Appl. Phys., vol. 44, no. 24, 2011

    2011

  7. [7]

    Perovskite ABO 3 Multiferroics: Mechanisms, Advancements, and Challenges ,

    A. R. Khan, S. Bhardwaj, and S. Kumar, “ Perovskite ABO 3 Multiferroics: Mechanisms, Advancements, and Challenges ,” ECS J. Solid State Sci. Technol., vol. 14, no. 5, p. 053004, 2025

    2025

  8. [8]

    Advances in magnetoelectric multiferroics,

    N. A. Spaldin and R. Ramesh, “Advances in magnetoelectric multiferroics,” Nat. Mater., vol. 18, no. 3, pp. 203–212, 2019

    2019

  9. [9]

    Status and perspectives of multiferroic magnetoelectric composite materials and applications,

    H. Palneedi, V. Annapureddy, S. Priya, and J. Ryu, “Status and perspectives of multiferroic magnetoelectric composite materials and applications,” Actuators, vol. 5, no. 1, 2016

    2016

  10. [10]

    Multiferroic BaTiO3-CoFe2O4 Nanostructures,

    H. Zheng, J. Wang, S.E. Lofland, Z. Ma, L. Mohaddes -Ardabili, T. Zhao, L. Salamanca - Riba, S.R. Shinde, S.B. Ogale, F. Bai, D. Viehland, Y. Jia, D.G. Schlom, M. Wuttig, A. Roytburd, R. Ramesh “Multiferroic BaTiO3-CoFe2O4 Nanostructures,” Science (80-. )., vol. 303, no. 5658, pp. 661–663, 2004

    2004

  11. [11]

    Structural, ferromagnetic, electrical, and dielectric relaxor properties of BaTiO 3 and CoFe2O4 bulk, nanoparticles, and nanocomposites materials for electronic devices,

    S. A. Raza, S. U. Awan, S. Hussain, S. A. Shah, A. M. Iqbal, and S. Khurshid Hasanain, “Structural, ferromagnetic, electrical, and dielectric relaxor properties of BaTiO 3 and CoFe2O4 bulk, nanoparticles, and nanocomposites materials for electronic devices,” J. Appl. Phys., vol. 128, no. 12, 2020

    2020

  12. [12]

    Magnetoelectricity in multiferroics: A theoretical perspective,

    S. Dong, H. Xiang, and E. Dagotto, “Magnetoelectricity in multiferroics: A theoretical perspective,” Natl. Sci. Rev., vol. 6, no. 4, pp. 629–641, 2019

    2019

  13. [13]

    Interplay of metallicity, ferroelectricity, and layer charges in SmNiO3/BaTiO3 superlattices,

    E. Simmen and N. A. Spaldin, “Interplay of metallicity, ferroelectricity, and layer charges in SmNiO3/BaTiO3 superlattices,” Phys. Rev. Res., vol. 7, no. 2, p. 23044, 2025

    2025

  14. [15]

    Magnetoelectric devices based on magnetoelectric bulk composites,

    Q. Mao J. Wu, Z. Hu, Y. Xu, Y. Du, Y. Hao, M. Guan, C. Wang, Z. Wang, Z. Zhou, S. Dong, W. Ren, M. Liu, Z. Jiang , “Magnetoelectric devices based on magnetoelectric bulk composites,” J. Mater. Chem. C, vol. 9, no. 17, pp. 5594–5614, 2021

    2021

  15. [16]

    A short history of multiferroics,

    T. Lottermoser and D. Meier, “A short history of multiferroics,” Multiferroics Fundam. Appl., pp. 1–11, 2021

    2021

  16. [17]

    Magnetoelectric effect: principles and applications in biology and medicine – a review,

    S. Kopyl, R. Surmenev, M. Surmeneva, Y. Fetisov, and A. Kholkin, “Magnetoelectric effect: principles and applications in biology and medicine – a review,” Mater. Today Bio, vol. 12, no. October, 2021

    2021

  17. [18]

    Investigations of structural, dielectric, optical, magnetic and magnetoelectric properties of biphasic BaTiO3 -CoFe2O4 composites,

    N. Hooda, R. Sharma, P. Dahiya, A. Hans, S. Malik, A. Hooda, S. Khasa, “Investigations of structural, dielectric, optical, magnetic and magnetoelectric properties of biphasic BaTiO3 -CoFe2O4 composites,” Appl. Phys. A Mater. Sci. Process., vol. 132, no. 1, 2026

    2026

  18. [19]

    Enhanced structural, magnetodielectric, and multiferroic response in Fe and Co Co -doped Barium strontium titanate ceramics,

    A. R. Khan R. Goel, A. Gupta, H. Tripathi, N. Kumar, S. Bhardwaj, S. Kumar, I. Sharma, G. Kumar, P. Sharma, S. Kumar, “Enhanced structural, magnetodielectric, and multiferroic response in Fe and Co Co -doped Barium strontium titanate ceramics,” Phys. Scr., vol. 99, no. 5, 2024

    2024

  19. [20]

    Structural, dielectric and magnetodielectric behavior of Bi 3.15Nd0.85Ti3- x(Fex/2Crx/2)O12 (0.0 ≤ x ≤ 0.4) ceramics,

    S. Rani, A.R. Khan, A. Sagar, S. Bhardwaj, A. Gupta, R. Goel, H. Tripathi, M.W. Alam, S. Kumar, “Structural, dielectric and magnetodielectric behavior of Bi 3.15Nd0.85Ti3- x(Fex/2Crx/2)O12 (0.0 ≤ x ≤ 0.4) ceramics,” Ceram. Int., vol. 51, no. 7, pp. 8558–8569, 2025

    2025

  20. [22]

    Hysteretic magnetoelectric behavior of CoFe2O4-BaTiO3 composites prepared by reductive sintering and reoxidation,

    T. Walther, U. Straube, R. Köferstein, and S. G. Ebbinghaus, “Hysteretic magnetoelectric behavior of CoFe2O4-BaTiO3 composites prepared by reductive sintering and reoxidation,” J. Mater. Chem. C, vol. 4, no. 21, pp. 4792–4799, 2016

    2016

  21. [23]

    Structural and magnetic properties of Sn and Ti doped Co ferrite,

    V. Vaithyanathan, K. Ugendar, J. Arout Chelvane, K. Kamala Bharathi, and S. S. R. Inbanathan, “Structural and magnetic properties of Sn and Ti doped Co ferrite,” J. Magn. Magn. Mater., vol. 382, pp. 88–92, 2015

    2015

  22. [24]

    CoFe 2O4 -BaTiO3 nanocomposites; role of ferrite phase on the structural, optical and magnetic properties,

    M. Bitaraf, M. E. Ghazi, and M. Izadifard, “CoFe 2O4 -BaTiO3 nanocomposites; role of ferrite phase on the structural, optical and magnetic properties,” Ferroelectrics, vol. 613, no. 1, pp. 231–249, 2023

    2023

  23. [25]

    Dynamic Magnetostriction of CoFe2O4 and Its Role in Magnetoelectric Composites,

    A. Aubert, V. Loyau, Y. Pascal, F. Mazaleyrat, and M. Lobue, “Dynamic Magnetostriction of CoFe2O4 and Its Role in Magnetoelectric Composites,” Phys. Rev. Appl., vol. 9, no. 4, 2018

    2018

  24. [26]

    Effect of concentration on lattice strain, dielectric properties and activation energy of CoFe2O4/BaTiO3 nanocomposites,

    U. K. Dwivedi, M. Kumari, M. Khan, H. Pawar, R. Singhal, and D. Rathore, “Effect of concentration on lattice strain, dielectric properties and activation energy of CoFe2O4/BaTiO3 nanocomposites,” Appl. Phys. A Mater. Sci. Process. , vol. 127, no. 6, 2021

    2021

  25. [27]

    Textural and crystallographic phase dependencies of functional properties in BST –BCT lead -free ferroelectric ceramics featuring polymorphic phase boundary,

    A. Anand, A. Tripathy, K. Dey, S. Mohanta, D. Kumar, H. Singh, R. Kumar, H. Srivastava, J.E. García, S. Murugavel, V. Sathe, D.K. Shukla, “Textural and crystallographic phase dependencies of functional properties in BST –BCT lead -free ferroelectric ceramics featuring polymorphic phase boundary,” J. Phys. D. Appl. Phys., vol. 59, no. 11, 2026

    2026

  26. [28]

    A Comprehensive Review of Strategies toward Efficient Flexible Piezoelectric Polymer Composites Based on BaTiO3 for Next-Generation Energy Harvesting,

    A. Bouhamed, S. Missaoui, A. Ben Ayed, A. Attaoui, D. Missaoui, K. Jeder, N. Guesmi, A. Njeh, H. Khemakhem, O. Kanoun, “A Comprehensive Review of Strategies toward Efficient Flexible Piezoelectric Polymer Composites Based on BaTiO3 for Next-Generation Energy Harvesting,” Energies, vol. 17, no. 16, 2024

    2024

  27. [29]

    Buscaglia, M

    V. Buscaglia, M. T. Buscaglia, and G. Canu, BaTiO3-based ceramics: Fundamentals, properties and applications, vol. 3–3, no. 1974. 2021

    1974

  28. [30]

    at 1100 °C and 1200 °C (b) Comparison of J -E characteristics for C10:B90 at different sintering temperatures. Fig. 8 illustrates the leakage current characteristics of CTFO -BTO composites at different sintering temperatures (1100 °C and 1200 °C) and varying compositions as a function of applied electric field. The leakage current increases with increasi...

    2026

  29. [31]

    Investigations on structural, dielectric, and ferroelectric properties of Bi 4-xNdxTi3O12 (x = 0.00, 0.85) ceramics,

    S. Rani, A. Sagar, A. R. Khan, A. Gupta, and S. Bhardwaj, “Investigations on structural, dielectric, and ferroelectric properties of Bi 4-xNdxTi3O12 (x = 0.00, 0.85) ceramics,” Interact. , vol. 245, no. 1, pp. 1–16, 2024

    2024

  30. [32]

    BaTiO3 -based piezoelectrics: Fundamentals, current status, and perspectives,

    A. You, M. Be, and I. In, “BaTiO3 -based piezoelectrics: Fundamentals, current status, and perspectives,” no. October 2022, 2020

    2022

  31. [33]

    Magnetic enhancement of ferroelectric polarization in a self-grown ferroelectric-ferromagnetic composite,

    A. Kumar, B. Narayan, R. Pachat, and R. Ranjan, “Magnetic enhancement of ferroelectric polarization in a self-grown ferroelectric-ferromagnetic composite,” Phys. Rev. B, vol. 97, no. 6, pp. 1–7, 2018

    2018

  32. [34]

    Atomistic description for temperature-driven phase transitions in BaTiO3,

    Y. Qi, S. Liu, I. Grinberg, and A. M. Rappe, “Atomistic description for temperature-driven phase transitions in BaTiO3,” Phys. Rev. B, vol. 94, no. 13, pp. 1–8, 2016

    2016

  33. [36]

    Influence of Fe 3+ and Co 2+ co-doping on the electrical, magnetodielectric, and multiferroic properties of lead -free Ba 0.7Sr0.3TiO3 ceramics,

    A. R. Khan, S. Bhardwaj, and S. Kumar, “Influence of Fe 3+ and Co 2+ co-doping on the electrical, magnetodielectric, and multiferroic properties of lead -free Ba 0.7Sr0.3TiO3 ceramics,” J. Magn. Magn. Mater., vol. 624, no. April, p. 173030, 2025

    2025

  34. [37]

    Tuning magnetodielectric coupling in Bi3.15Nd0.85Ti3-x(Fex/2Eux/2)O12ceramics: Unveiling structure –property interplay in multiferroic ceramics,

    S. Rani, A.R. Khan, A. Sagar, A. Gupta, S. Bhardwaj, H. Tripathi, R. Sharma, M. Kumar, R. Goel, S. Sadaf, M.W. Alam, S. Kumar, “Tuning magnetodielectric coupling in Bi3.15Nd0.85Ti3-x(Fex/2Eux/2)O12ceramics: Unveiling structure –property interplay in multiferroic ceramics,” Ceram. Int., no. February, 2026

    2026

  35. [38]

    Improved multiferroic and magnetodielectric properties in Ni and Fe co-doped barium strontium titanate ceramics,

    A.R. Khan, R. Goel, A. Gupta, H. Tripathi, N. Kumar, S. Bhardwaj, S. Kumar, G. Kumar, P. Sharma, S. Kumar, “Improved multiferroic and magnetodielectric properties in Ni and Fe co-doped barium strontium titanate ceramics,” J. Mater. Sci. Mater. Electron. , vol. 35, no. 20, pp. 1–20, 2024

    2024

  36. [39]

    Electrical, magnetic, and magneto- electric properties of PVDF/ZnFe 2O4 polymer nanocomposites,

    H. Chouhan, M. Panda, S. Mohanta, and D. K. Shukla, “Electrical, magnetic, and magneto- electric properties of PVDF/ZnFe 2O4 polymer nanocomposites,” J. Mater. Sci. Mater. Electron., vol. 36, no. 11, pp. 1–18, 2025

    2025

  37. [40]

    Magnetoelectric Effect in Hydrogen Harvesting: Magnetic Field as a Trigger of Catalytic Reactions,

    D. Kim, I. Efe, H. Torlakcik, A. Terzopoulou, A. Veciana, E. Siringil, F. Mushtaq, C. Franco, D. von Arx, S. Sevim, J. Puigmartí -Luis, B. Nelson, N.A. Spaldin, C. Gattinoni, X.Z. Chen, S. Pané, “Magnetoelectric Effect in Hydrogen Harvesting: Magnetic Field as a Trigger of Catalytic Reactions,” Adv. Mater., vol. 34, no. 19, pp. 1–7, 2022

    2022

  38. [41]

    Enhanced magnetoelectric coupling in Ti and Ce substituted lead free CFO-BCZT laminate composites,

    J. Paul Praveen, V.R. Monaji, E. Chandrakala, S. Indla, S. Dinesh Kumar, V. Subramanian, D. Das, “Enhanced magnetoelectric coupling in Ti and Ce substituted lead free CFO-BCZT laminate composites,” J. Alloys Compd., vol. 750, pp. 392–400, 2018

    2018

  39. [42]

    Structural and magnetic characterization of Ti doped cobalt ferrite (CoFe2O4),

    J. Pal, S. Kumar, R. Kaur, P. Agrawal, M. Singh, and A. Singh, “Structural and magnetic characterization of Ti doped cobalt ferrite (CoFe2O4),” AIP Conf. Proc., vol. 1953, pp. 1–6, 2018

    1953

  40. [43]

    Structural study of Ti- doped CoFe2O4 mixed spinel ferrite,

    P. Choudhary, P. Sharma, A. Kumar, M. A. Dar, and D. Varshney, “Structural study of Ti- doped CoFe2O4 mixed spinel ferrite,” AIP Conf. Proc., vol. 1728, 2016

    2016

  41. [45]

    452001, 2022

    Koushik Dey, thesis: understanding the origin of high piezo response in lead -free perovskite,” vol. 452001, 2022

    2022

  42. [46]

    Magnetoelectric measurements by two different methods of cobalt ferrite-barium titanate composites,

    M. E. Botello-Zubiate, D. Bueno-Baqués, J. De Frutos Vaquerizo, L. E. Fuentes Cobas, and J. A. Matutes-Aquino, “Magnetoelectric measurements by two different methods of cobalt ferrite-barium titanate composites,” Ferroelectrics, vol. 338, pp. 247–253, 2006

    2006

  43. [47]

    Piezoelectrics and Multifunctional Composites,

    R. Ramadurai and V. Kannan, “Piezoelectrics and Multifunctional Composites,” Perovskites Relat. Mix. Oxides Concepts Appl., pp. 211–232, 2015

    2015

  44. [48]

    Journal of the European Ceramic Society BaTiO 3–CoFe2O4–BaTiO 3 trilayer composite thin films prepared by chemical solution deposition,

    T. Walther, N. Quandt, R. Köferstein, R. Roth, M. Steimecke, and S. G. Ebbinghaus, “Journal of the European Ceramic Society BaTiO 3–CoFe2O4–BaTiO 3 trilayer composite thin films prepared by chemical solution deposition,” vol. 36, pp. 559–565, 2016

    2016

  45. [49]

    Stoichiometry of CoFe2O4 as a key to phase control and improved functional properties of multiferroic BaTiO3-CoFe2O4 bulk composites,

    D. Lewin, S. Shamsulbahrin, V. V. Shvartsman, and D. C. Lupascu, “Stoichiometry of CoFe2O4 as a key to phase control and improved functional properties of multiferroic BaTiO3-CoFe2O4 bulk composites,” Ceram. Int., vol. 51, no. 18, pp. 24596–24604, 2025

    2025

  46. [50]

    Magnetic properties of sintered CoFe 2O4–BaTiO3 particulate magnetoelectric composites,

    S. Mohan and P. A. Joy, “Magnetic properties of sintered CoFe 2O4–BaTiO3 particulate magnetoelectric composites,” Ceram. Int., vol. 45, no. 9, pp. 12307–12311, 2019

    2019

  47. [51]

    Microstructure and magnetoresistance driven magnetocapacitance in ex -situ combustion derived BaTiO 3-CoFe2O4 bulk magnetodielectric composites,

    S. Pachari, S. K. Pratihar, and B. B. Nayak, “Microstructure and magnetoresistance driven magnetocapacitance in ex -situ combustion derived BaTiO 3-CoFe2O4 bulk magnetodielectric composites,” J. Magn. Magn. Mater., vol. 561, no. July, 2022

    2022

  48. [52]

    Effect of grain size on dielectric and ferroelectric properties of nanostructured Ba0.8Sr0.2TiO3 ceramics,

    V. R. Mudinepalli, L. Feng, W. C. Lin, and B. S. Murty, “Effect of grain size on dielectric and ferroelectric properties of nanostructured Ba0.8Sr0.2TiO3 ceramics,” J. Adv. Ceram., vol. 4, no. 1, pp. 46–53, 2015

    2015

  49. [53]

    Morphotropic Phase Boundary in Ferroelectric Materials,

    A.-B. M. A. Ibrahim, R. Murgan, M. K. Abd Rahman, and J. Osm, “Morphotropic Phase Boundary in Ferroelectric Materials,” Ferroelectr. - Phys. Eff., 2011

    2011

  50. [54]

    Room temperature magneto ‑ dielectric coupling in the ­ CaMnO 3 modified NBT lead ‑ free ceramics,

    K. Suman, S. Ruhul, A. Saniya, A. A. K. Pathak, and C. H. A. Mekki, “Room temperature magneto ‑ dielectric coupling in the ­ CaMnO 3 modified NBT lead ‑ free ceramics,” no. 2023, pp. 1–19, 2024

    2023

  51. [55]

    Dielectric and electrical properties of 2/3Pb(Mg 1/3Nb2/3)O3-1/3PbTiO3:CoFe1.97RE0.03O4 (RE = La 3+ and Eu 3+) composites,

    G. Channagoudra, N. Bano, D. K. Shukla, and V. Dayal, “Dielectric and electrical properties of 2/3Pb(Mg 1/3Nb2/3)O3-1/3PbTiO3:CoFe1.97RE0.03O4 (RE = La 3+ and Eu 3+) composites,” Appl. Phys. A Mater. Sci. Process., vol. 129, no. 1, 2023

    2023

  52. [57]

    Ferroelectric -Ferrite Composites for Enhanced Magnetoelectric Properties,

    M. Kumari, P. Yadav, N. Dhariwal, V. Kumar, and O. P. Thakur, “Ferroelectric -Ferrite Composites for Enhanced Magnetoelectric Properties,” IEEE Trans. Dielectr. Electr. Insul., vol. 31, no. 2, pp. 658–665, 2024

    2024

  53. [58]

    Ferroelectric phase transition of BaTiO3 single crystal based on a tenth order Landau-Devonshire potential,

    Z. Ma et al., “Ferroelectric phase transition of BaTiO3 single crystal based on a tenth order Landau-Devonshire potential,” Comput. Mater. Sci., vol. 135, pp. 109–118, 2017

    2017

  54. [59]

    Maxwell -Wagner-Sillars interfacial polarization in dielectric spectra of composite materials: Scaling laws and applications,

    M. Samet, A. Kallel, and A. Serghei, “Maxwell -Wagner-Sillars interfacial polarization in dielectric spectra of composite materials: Scaling laws and applications,” J. Compos. Mater., vol. 56, no. 20, pp. 3197–3217, 2022

    2022

  55. [60]

    Applied Surface Science Engineering the Maxwell – Wagner polarization effect,

    T. Prodromakis and C. Papavassiliou, “Applied Surface Science Engineering the Maxwell – Wagner polarization effect,” vol. 255, pp. 6989–6994, 2009

    2009

  56. [61]

    Synthesis and characterization of Ni0.8Co0.2Fe 2O4-Ba0.95Sr0.05TiO3 multiferroic composites,

    P. Pahuja, R. Sharma, C. Prakash, and R. P. Tandon, “Synthesis and characterization of Ni0.8Co0.2Fe 2O4-Ba0.95Sr0.05TiO3 multiferroic composites,” Ceram. Int., vol. 39, no. 8, pp. 9435–9445, 2013

    2013

  57. [62]

    Conductivity behavior and impedance studies in BaTiO 3–CoFe2O4 magnetoelectric composites,

    S.Shankar, O. P. Thakur, and M. Jayasimhadri, “Conductivity behavior and impedance studies in BaTiO 3–CoFe2O4 magnetoelectric composites,” Mater. Chem. Phys. , vol. 234, no. May, pp. 110–121, 2019

    2019

  58. [63]

    Experimental set up of a magnetoelectric measuring system operating at different temperatures,

    K. Gil, J. Gil, B. Cruz, A. Ramirez, M. Medina, and J. Torres, “Experimental set up of a magnetoelectric measuring system operating at different temperatures,” J. Phys. Conf. Ser., vol. 687, no. 1, 2016

    2016

  59. [64]

    Theory of low -frequency magnetoelectric coupling in magnetostrictive-piezoelectric bilayers,

    I. Bichurin, M. Petrov, and G. Srinivasan, “Theory of low -frequency magnetoelectric coupling in magnetostrictive-piezoelectric bilayers,” Phys. Rev. B - Condens. Matter Mater. Phys., vol. 68, no. 5, pp. 1–13, 2003

    2003

  60. [65]

    Spectroscopic investigation of percolation and magneto -electric properties of PVDF/CoFe2O4 polymer nanocomposites,

    H. Chouhan, M. Panda, S. K. Behera, A. Anand, S. Mohanta, and D. K. Shukla, “Spectroscopic investigation of percolation and magneto -electric properties of PVDF/CoFe2O4 polymer nanocomposites,” Mod. Phys. Lett. B , vol. 40, no. 4, pp. 1 –27, 2026

    2026

  61. [66]

    CoFe2O4–BaTiO3 multiferroic composites: role of ferrite and ferroelectric phases on the structural, magneto dielectric properties,

    T. Ramesh, V. Rajendar, and S. R. Murthy, “CoFe2O4–BaTiO3 multiferroic composites: role of ferrite and ferroelectric phases on the structural, magneto dielectric properties,” J. Mater. Sci. Mater. Electron., vol. 28, no. 16, pp. 11779–11788, 2017. Ceramics International, DOI: 10.1016/j.ceramint.2026.05.356 30

    work page doi:10.1016/j.ceramint.2026.05.356 2017

  62. [67]

    Multiferroic properties of multilayered BaTiO 3- CoFe2O4 composites via tape casting method,

    L. Hao, D. Zhou, Q. Fu, and Y. Hu, “Multiferroic properties of multilayered BaTiO 3- CoFe2O4 composites via tape casting method,” J. Mater. Sci., vol. 48, no. 1, pp. 178 –185, 2013

    2013

  63. [68]

    Exchange -spring mechanism and Griffiths -like phase in room -temperature magnetoelectric Ni - BaTiO3composites,

    R. Revathy, N. Kalarikkal, M. R. Varma, and K. P. Surendran, “Exchange -spring mechanism and Griffiths -like phase in room -temperature magnetoelectric Ni - BaTiO3composites,” Mater. Adv., vol. 2, no. 14, pp. 4702–4720, 2021

    2021

  64. [69]

    Magnetoelectric coupling in terbium doped particulate multiferroic composites based on BaTiO 3–CoFe2O4,

    G. H. Rather and M. Ikram, “Magnetoelectric coupling in terbium doped particulate multiferroic composites based on BaTiO 3–CoFe2O4,” Phys. B Condens. Matter , vol. 599, no. August, p. 412577, 2020

    2020

  65. [70]

    Investigation of room temperature magnetoelectric coupling behaviour of novel lead -free (1-x)BaTi0.89Sn0.11O3- xCoFe1.9Bi0.1O3 particulate composites,

    A. Sasmal, P. Maiti, J. A. Chelvane, and A. Arockiarajan, “Investigation of room temperature magnetoelectric coupling behaviour of novel lead -free (1-x)BaTi0.89Sn0.11O3- xCoFe1.9Bi0.1O3 particulate composites,” Appl. Phys. A Mater. Sci. Process. , vol. 130, no. 4, pp. 1–14, 2024

    2024

  66. [71]

    Enhancement of magnetoelectric effect in multiferroic composites of dysprosium and zinc doped BaTiO 3–CoFe2O4,

    G. H. Rather and M. Ikram, “Enhancement of magnetoelectric effect in multiferroic composites of dysprosium and zinc doped BaTiO 3–CoFe2O4,” J. Mater. Sci. Mater. Electron., vol. 32, no. 1, pp. 551–566, 2021

    2021

This paper was first reviewed by deepseek-v4-flash on August 1, 2026.