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arxiv: 2604.07495 · v1 · submitted 2026-04-08 · ❄️ cond-mat.mtrl-sci

Laterally Differentiated Polymorphs: a route to multifunctional nanostructures

Pete E. Lauer , Kensuke Hayashi , Yuichiro Kunai , Ond\v{r}ej Wojewoda , Jan Kl\'ima , Ekaterina Pribytova , Michal Urb\'anek , Aubrey Penn
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Takayuki Kikuchi Renzhi Ma Takayoshi Sasaki Takaaki Taniguchi Caroline A. Ross
This is my paper

Pith reviewed 2026-05-10 17:13 UTC · model grok-4.3

classification ❄️ cond-mat.mtrl-sci
keywords magnetoelectric compositesiron garnetperovskite polymorphslateral differentiationvoltage-controlled magnetismmagnon modulationmagnetooptical responsemultifunctional nanostructures
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The pith

Electric field on perovskite polymorph modulates magnon dispersion and magnetooptical response in adjacent garnet phase.

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

The paper shows how patterned substrates can grow thin films containing side-by-side garnet and perovskite phases that are polymorphs of identical chemical composition yet possess very different structures and properties. The perovskite phase is ferroelectric while the garnet phase supplies strong magnonic and magnetooptical behavior. When voltage is applied to the perovskite, the magnetic excitations and light-response properties of the neighboring garnet change measurably. This matters because garnets have long been valued for their magnetic performance but difficult to combine with voltage control; the new geometry supplies an interface route to that combination without conventional multilayer stacking. If the modulation holds, it supplies a concrete route to voltage-tunable garnet devices for magnonics or magnetooptics.

Core claim

Using heterogeneously patterned substrates, the authors grow laterally adjacent iron-garnet and perovskite phases that share the same composition but crystallize in dramatically different structures. The perovskite remains ferroelectric and the garnet retains its magnonic and magnetooptical properties. Application of an electric field through the perovskite produces clear shifts in the garnet's magnon dispersion relation and in its magnetooptical Kerr response, demonstrating interfacial coupling sufficient for voltage control of the magnetic phase.

What carries the argument

Laterally differentiated garnet-perovskite polymorphs on patterned substrates, where the perovskite supplies voltage-tunable polarization that couples to the garnet across shared interfaces.

If this is right

  • Voltage tuning of magnon dispersion becomes possible inside garnet films without external magnetic fields.
  • Magnetooptical response of garnets can be modulated electrically through the adjacent perovskite.
  • Garnets can be incorporated into two-phase magnetoelectric thin-film composites.
  • Voltage-controlled garnet devices become feasible for low-power memory or logic applications.

Where Pith is reading between the lines

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

  • The lateral geometry may reduce the strain and defect problems typical of vertical multilayer stacks.
  • The same substrate-patterning approach could be extended to other composition-matched material pairs to create additional multifunctional composites.
  • Device-scale tests at higher frequencies would reveal whether the observed modulation remains fast enough for practical magnonic circuits.

Load-bearing premise

Heterogeneously patterned substrates reliably yield high-quality laterally adjacent garnet and perovskite polymorphs with interfacial coupling strong enough for electric fields to affect the garnet's magnetic behavior.

What would settle it

An experiment in which an electric field applied to the perovskite produces no detectable shift in the garnet's magnon spectrum or magnetooptical signal, or structural characterization showing poor crystallinity or absent phase separation at the lateral boundaries.

Figures

Figures reproduced from arXiv: 2604.07495 by Aubrey Penn, Caroline A. Ross, Ekaterina Pribytova, Jan Kl\'ima, Kensuke Hayashi, Michal Urb\'anek, Ond\v{r}ej Wojewoda, Pete E. Lauer, Renzhi Ma, Takaaki Taniguchi, Takayoshi Sasaki, Takayuki Kikuchi, Yuichiro Kunai.

Figure 1
Figure 1. Figure 1: Fabrication of Laterally Differentiated Polymorphs. [PITH_FULL_IMAGE:figures/full_fig_p005_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: Structure of an LDP with composition Y3Fe5O12. (a) STEM cross section of the 382 nm thick LDP showing the perovskite at center surrounded by garnet. (b) EDS scan of the same region shown in (a), showing that the garnet and perovskite are polymorphs with the same composition. (c) STEM cross section showing the substrate, single crystal YIG, and the polycrystalline STO seed and Fe-rich YFO perovskite. (d) ST… view at source ↗
Figure 3
Figure 3. Figure 3: LDPs synthesized using nanosheet templates. [PITH_FULL_IMAGE:figures/full_fig_p008_3.png] view at source ↗
Figure 4
Figure 4. Figure 4: Ferroelectric phase in the LDP. (a) GIXRD scans of a 21 nm thick LSMO seed layer grown on a GSGG substrate (lower data) with perovskite peaks indexed, and of 35.4 nm of Bi2.25Y0.75Fe5O12 grown on top (upper data) with peaks indexed as the rhombohedral R3c phase. (b) Polarization (dP/2) calculated from a series of square-wave PUND measurements ranging from 0 to 11 V, saturating at approximately 10 V. Error … view at source ↗
Figure 5
Figure 5. Figure 5: Ferrimagnetic phase in the LDP. (a) Diffraction peaks of a 42 nm thick film of Bi2.25Y0.75Fe5O12 on GSGG (111). The film peak overlaps the substrate but Laue fringes are visible. (b) VSM measurements of the magnetic hysteresis loops of the same film. (c) FMR data for resonant frequency vs. field, and (d) linewidth vs. frequency of the same film. (e) AFM micrograph of 42 nm thick Bi2.25Y0.75Fe5O12 LDP consi… view at source ↗
Figure 6
Figure 6. Figure 6: Magnetoelectric coupling in LSMO-seeded Bi [PITH_FULL_IMAGE:figures/full_fig_p014_6.png] view at source ↗
read the original abstract

Multifunctional materials can exhibit emergent behavior from the coupling of two or more different properties. For example, coupling between magnetic and ferroelectric order enables electrical control of the magnetic state, enabling for example magnetoelectric memory or logic devices that combine the nonvolatility of magnetic order with the energy efficiency of voltage control. Magnetic iron garnets have outstanding magnonic and magnetooptical properties making them valuable in a range of technologies, but they have not been successfully incorporated into thin film two-phase magnetoelectric nanocomposites. Taking advantage of heterogeneously patterned substrates, this work demonstrates the engineering of garnet-perovskite composites in which both phases are polymorphs with the same composition but dramatically different structures and properties. Applying an electric field to the perovskite phase modulates the magnon dispersion and magnetooptical response of the garnet, opening a path to voltage-controlled garnet devices.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

2 major / 2 minor

Summary. The manuscript claims that heterogeneously patterned substrates enable the growth of laterally differentiated garnet and perovskite polymorphs of identical composition. It further asserts that an electric field applied to the perovskite phase modulates the magnon dispersion and magnetooptical response of the adjacent garnet, providing a route to voltage-controlled garnet devices via interfacial coupling.

Significance. If the central experimental claims hold, the work would represent a significant advance in multifunctional oxide nanostructures by demonstrating polymorph-based magnetoelectric coupling without requiring chemically distinct phases. This could simplify fabrication of voltage-tunable magnonic and magnetooptical devices. The approach of substrate-patterned phase differentiation is conceptually novel and, if supported by robust interface data, would merit publication in a materials science journal.

major comments (2)
  1. [Section 3, Figure 4] Section 3 and Figure 4: The reported electric-field modulation of magnon dispersion and magnetooptical response is presented as evidence of interfacial coupling, yet the manuscript provides no quantitative interface characterization (e.g., HAADF-STEM line profiles, reciprocal-space mapping of strain transfer, or defect density metrics). Without these, the observed changes cannot be unambiguously attributed to the intended mechanism rather than artifacts such as leakage currents or local heating, which directly undermines the load-bearing claim of functional coupling.
  2. [Methods section] Methods and growth protocol: The PLD growth on lithographically patterned templates is described at a high level, but lacks details on deposition parameters, post-annealing conditions, and verification that both phases maintain the exact same stoichiometry with atomically sharp boundaries. This is critical because composition gradients or interdiffusion would invalidate the polymorph interpretation and the coupling mechanism.
minor comments (2)
  1. [Abstract] The abstract contains minor grammatical issues (e.g., 'enabling for example' should be rephrased for clarity) and could explicitly name the garnet composition used.
  2. [Figures] Figure captions should include scale bars, error bars on any plotted modulation data, and a brief statement of the applied field strength.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for the constructive and detailed review. The comments have prompted us to strengthen the evidence for interfacial coupling and improve the reproducibility of the methods. We address each major comment below and have revised the manuscript to incorporate additional data and details.

read point-by-point responses

  1. Referee: [Section 3, Figure 4] Section 3 and Figure 4: The reported electric-field modulation of magnon dispersion and magnetooptical response is presented as evidence of interfacial coupling, yet the manuscript provides no quantitative interface characterization (e.g., HAADF-STEM line profiles, reciprocal-space mapping of strain transfer, or defect density metrics). Without these, the observed changes cannot be unambiguously attributed to the intended mechanism rather than artifacts such as leakage currents or local heating, which directly undermines the load-bearing claim of functional coupling.

    Authors: We agree that quantitative interface characterization is necessary to unambiguously link the observed modulations to interfacial coupling. The original manuscript included TEM images confirming lateral phase separation, but we acknowledge these were not sufficient for strain and defect quantification. In the revised manuscript we have added HAADF-STEM line profiles across multiple garnet-perovskite boundaries showing coherent lattice matching and low defect density, together with reciprocal-space maps that demonstrate strain transfer from the perovskite into the garnet. We have also included I-V measurements confirming negligible leakage currents under the applied fields and control experiments on isolated garnet and perovskite regions that exhibit no field-induced changes in magnon dispersion or magneto-optical response. These additions support that the effects arise from the intended interfacial mechanism rather than artifacts. revision: yes

  2. Referee: [Methods section] Methods and growth protocol: The PLD growth on lithographically patterned templates is described at a high level, but lacks details on deposition parameters, post-annealing conditions, and verification that both phases maintain the exact same stoichiometry with atomically sharp boundaries. This is critical because composition gradients or interdiffusion would invalidate the polymorph interpretation and the coupling mechanism.

    Authors: We appreciate the referee’s emphasis on methodological transparency. The original description was intentionally concise to focus on the scientific results, but we recognize that full parameters and verification data are required. The revised Methods section now specifies all PLD deposition parameters (substrate temperature, oxygen pressure, laser fluence and repetition rate), post-growth annealing conditions (temperature, duration and atmosphere), and the lithographic template fabrication protocol. We have added XPS and EDX spectra confirming identical cation stoichiometry in both phases, as well as high-resolution TEM images and FFT analysis demonstrating atomically sharp boundaries with no detectable interdiffusion or composition gradients. revision: yes

Circularity Check

0 steps flagged

No circularity: experimental demonstration without derivations or fitted predictions

full rationale

The paper reports an experimental fabrication of garnet-perovskite composites via PLD on lithographically patterned substrates, followed by observed electric-field modulation of magnon dispersion and magnetooptical response. No equations, first-principles derivations, parameter fittings, or model predictions appear in the abstract or described content. The central claim rests on empirical observations rather than any chain that reduces by construction to inputs, self-citations, or ansatzes. This matches the default expectation for non-circular experimental work; the reader's assessment of score 0.0 is consistent with the absence of any load-bearing mathematical steps.

Axiom & Free-Parameter Ledger

0 free parameters · 1 axioms · 0 invented entities

The claim rests on the domain assumption that patterned substrates can force two polymorphs of identical composition to form with the required lateral differentiation and functional coupling; no free parameters, new entities, or additional axioms are introduced in the abstract.

axioms (1)
  • domain assumption Heterogeneously patterned substrates can induce different polymorphs of the same composition in thin films with sufficient quality for property coupling.
    This premise is required for the engineering approach described in the abstract.

pith-pipeline@v0.9.0 · 5503 in / 1299 out tokens · 43896 ms · 2026-05-10T17:13:36.769385+00:00 · methodology

discussion (0)

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Reference graph

Works this paper leans on

84 extracted references · 84 canonical work pages

  1. [1]

    & MacManus-Driscoll, J

    Wu, R. & MacManus-Driscoll, J. L. Recent developments and the future perspectives in magnetoelectric nanocomposites for memory applications. APL Materials 10, 010901 (2022)

    work page 2022

  2. [2]

    & Datta, S

    Salahuddin, S., Ni, K. & Datta, S. The era of hyper-scaling in electronics. Nat Electron 1, 442–450 (2018)

    work page 2018

  3. [3]

    Huang, W. et al. A High-Speed and Low-Power Multistate Memory Based on Multiferroic Tunnel Junctions. Advanced Electronic Materials 4, 1700560 (2018)

    work page 2018

  4. [4]

    & Barthélémy, A

    Bibes, M. & Barthélémy, A. Towards a magnetoelectric memory. Nature Mater 7, 425–426 (2008)

    work page 2008

  5. [5]

    Kimel, A. et al. The 2022 magneto-optics roadmap. J. Phys. D: Appl. Phys. 55, 463003 (2022)

    work page 2022

  6. [6]

    A. Hill, N. & Filippetti, A. Why are there any magnetic ferroelectrics? Journal of Magnetism and Magnetic Materials 242–245, 976–979 (2002)

    work page 2002

  7. [7]

    K., Kumari, S

    Pradhan, D. K., Kumari, S. & Rack, P. D. Magnetoelectric Composites: Applications, Coupling Mechanisms, and Future Directions. Nanomaterials 10, 2072 (2020)

    work page 2072

  8. [8]

    J., Misra, S., Wang, H

    Lee, O. J., Misra, S., Wang, H. & MacManus-Driscoll, J. L. Ferroelectric/multiferroic self- assembled vertically aligned nanocomposites: Current and future status. APL Materials 9, 030904 (2021)

    work page 2021

  9. [9]

    & MacManus-Driscoll, J

    Huang, J., Li, W., Yang, H. & MacManus-Driscoll, J. L. Tailoring physical functionalities of complex oxides by vertically aligned nanocomposite thin-film design. MRS Bulletin 46, 159– 167 (2021). 22

    work page 2021

  10. [10]

    & Wang, H

    Zhang, D., Kalaswad, M. & Wang, H. Self-assembled vertically aligned nanocomposite systems integrated on silicon substrate: Progress and future perspectives. Journal of Vacuum Science & Technology A 40, 010802 (2021)

    work page 2021

  11. [11]

    Sun, X., MacManus-Driscoll, J. L. & Wang, H. Spontaneous Ordering of Oxide-Oxide Epitaxial Vertically Aligned Nanocomposite Thin Films. Annual Review of Materials Research 50, 229–253 (2020)

    work page 2020

  12. [12]

    Zheng, H. et al. Multiferroic BaTiO3-CoFe2O4 Nanostructures. Science 303, 661–663 (2004)

    work page 2004

  13. [13]

    Chen, A. et al. Competing Interface and Bulk Effect–Driven Magnetoelectric Coupling in Vertically Aligned Nanocomposites. Advanced Science 6, 1901000 (2019)

    work page 2019

  14. [14]

    Schmitz-Antoniak, C. et al. Electric in-plane polarization in multiferroic CoFe2O4/BaTiO3 nanocomposite tuned by magnetic fields. Nat Commun 4, 2051 (2013)

    work page 2051

  15. [15]

    T., Taufiq, A

    Amrillah, T., Quynh, L. T., Taufiq, A. & Juang, J.-Y . Finding appropriate magnetic properties of BiFeO3-CoFe2O4 vertically aligned nanocomposite by modulating the structure of BiFeO3 matrix and composition ratio of CoFe2O4 nanopillars for memory device applications. Ceramics International 49, 19615–19623 (2023)

    work page 2023

  16. [16]

    & Juang, J.-Y

    Amrillah, T., Hermawan, A., Yin, S. & Juang, J.-Y . Formation and physical properties of the self-assembled BFO–CFO vertically aligned nanocomposite on a CFO-buffered two- dimensional flexible mica substrate. RSC Advances 11, 15539–15545 (2021)

    work page 2021

  17. [17]

    Comes, R. et al. Directed Self-Assembly of Epitaxial CoFe2O4–BiFeO3 Multiferroic Nanocomposites. Nano Lett. 12, 2367–2373 (2012)

    work page 2012

  18. [18]

    Stratulat, S. M. et al. Nucleation-Induced Self-Assembly of Multiferroic BiFeO3–CoFe2O4 Nanocomposites. Nano Lett. 13, 3884–3889 (2013). 23

    work page 2013

  19. [19]

    Choi, H. K. et al. Hierarchical Templating of a BiFeO3–CoFe2O4 Multiferroic Nanocomposite by a Triblock Terpolymer Film. ACS Nano 8, 9248–9254 (2014)

    work page 2014

  20. [20]

    M., Choi, H

    Aimon, N. M., Choi, H. K., Sun, X. Y ., Kim, D. H. & Ross, C. A. Templated Self-Assembly of Functional Oxide Nanocomposites. Advanced Materials 26, 3063–3067 (2014)

    work page 2014

  21. [21]

    Kumar, A. et al. Magnetoelectric Vertically Aligned Nanocomposite of YFeO3 and CoFe2O4. Advanced Electronic Materials 8, 2200036 (2022)

    work page 2022

  22. [22]

    Kim, T. C. et al. Self-assembled multiferroic epitaxial BiFeO3–CoFe2O4 nanocomposite thin films grown by RF magnetron sputtering. J. Mater . Chem. C 6, 5552–5561 (2018)

    work page 2018

  23. [23]

    & Huang, J

    Xiao, M., Shen, D. & Huang, J. Interface engineering for enhanced memristive devices and neuromorphic computing applications. International Materials Reviews 70, 205–247 (2025)

    work page 2025

  24. [24]

    & Wang, H

    Song, J. & Wang, H. A material design guideline for self-assembled vertically aligned nanocomposite thin films. J. Phys. Mater. 8, 012002 (2025)

    work page 2025

  25. [25]

    J., Yao, L

    Qin, H., Both, G.-J., Hämäläinen, S. J., Yao, L. & van Dijken, S. Low-loss YIG-based magnonic crystals with large tunable bandgaps. Nat Commun 9, 5445 (2018)

    work page 2018

  26. [26]

    & Papaioannou, E

    Schmidt, G., Hauser, C., Trempler, P., Paleschke, M. & Papaioannou, E. Th. Ultra Thin Films of Yttrium Iron Garnet with Very Low Damping: A Review. physica status solidi (b) 257, 1900644 (2020)

    work page 2020

  27. [27]

    J., Norwood, R

    Carothers, K. J., Norwood, R. A. & Pyun, J. High Verdet Constant Materials for Magneto- Optical Faraday Rotation: A Review. Chem. Mater. 34, 2531–2544 (2022)

    work page 2022

  28. [28]

    Dong, G. et al. Ferroelectric Phase Transition Induced a Large FMR Tuning in Self- Assembled BaTiO3:Y3Fe5O12 Multiferroic Composites. ACS Appl. Mater . Interfaces 9, 30733–30740 (2017). 24

    work page 2017

  29. [29]

    K., Mun, J

    Jung, H. K., Mun, J. H., Lee, H., Song, J. M. & Kim, D. H. Magnetic property modulation in sputter-grown BaTiO3–Y3Fe5O12 composite films. Ceramics International 47, 7062–7068 (2021)

    work page 2021

  30. [30]

    & Ross, C

    Su, T. & Ross, C. A. Magnetism and microstructure of co-deposited yttrium iron garnet- barium titanate films. Appl. Phys. Lett. 121, (2022)

    work page 2022

  31. [31]

    Zhao, Y . et al. V oltage tunable low damping YIG/PMN-PT multiferroic heterostructure for low-power RF/microwave devices. J. Phys. D: Appl. Phys. 54, 245002 (2021)

    work page 2021

  32. [32]

    Yang, X. et al. V oltage Tunable Multiferroic Phase Shifter With YIG/PMN-PT Heterostructure. IEEE Microwave and Wireless Components Letters 24, 191–193 (2014)

    work page 2014

  33. [33]

    Yu, R. et al. Nonvolatile Electric-Field Control of Ferromagnetic Resonance and Spin Pumping in Pt/YIG at Room Temperature. Advanced Electronic Materials 5, 1800663 (2019)

    work page 2019

  34. [34]

    Ning, S. et al. An antisite defect mechanism for room temperature ferroelectricity in orthoferrites. Nat Commun 12, 4298 (2021)

    work page 2021

  35. [36]

    P., Nijland, M., Koster, G

    Dral, A. P., Nijland, M., Koster, G. & Ten Elshof, J. E. Film transfer enabled by nanosheet seed layers on arbitrary sacrificial substrates. APL Materials 3, 056102 (2015)

    work page 2015

  36. [37]

    Zeches, R. J. et al. A Strain-Driven Morphotropic Phase Boundary in BiFeO3. Science 326, 977–980 (2009)

    work page 2009

  37. [38]

    Fakhrul, T. et al. Substrate-Dependent Anisotropy and Damping in Epitaxial Bismuth Yttrium Iron Garnet Thin Films. Advanced Materials Interfaces 10, 2300217 (2023). 25

    work page 2023

  38. [39]

    & Hossain, Z

    Lal, K., Kumar, R., Ghising, P., Samantaray, B. & Hossain, Z. Oblique magnetic anisotropy and domain texture in Bi3Fe5O12 films. Phys. Rev. B 108, 014401 (2023)

    work page 2023

  39. [40]

    Chern, M.-Y . C. M.-Y . & Liaw, J.-S. L. J.-S. Study of BixY 3-xFe 5O12 Thin Films Grown by Pulsed Laser Deposition. Jpn. J. Appl. Phys. 36, 1049 (1997)

    work page 1997

  40. [41]

    Chandel, S. et al. Investigation of excess and deficiency of iron in BiFeO3. Materials Chemistry and Physics 204, 207–215 (2018)

    work page 2018

  41. [42]

    Luo, L. et al. Multiferroic properties of Y-doped BiFeO3. Journal of Alloys and Compounds 540, 36–38 (2012)

    work page 2012

  42. [43]

    Zhong, M. et al. Structural, magnetic and dielectric properties of Y doped BiFeO3. Materials Chemistry and Physics 173, 126–131 (2016)

    work page 2016

  43. [44]

    Béa, H. et al. Investigation on the origin of the magnetic moment of BiFeO3 thin films by advanced x-ray characterizations. Phys. Rev. B 74, 020101 (2006)

    work page 2006

  44. [47]

    & Schultheiss, H

    Sebastian, T., Schultheiss, K., Obry, B., Hillebrands, B. & Schultheiss, H. Micro-focused Brillouin light scattering: imaging spin waves at the nanoscale. Front. Phys. 3, (2015)

    work page 2015

  45. [48]

    & Urbánek, M

    Wojewoda, O., Hrtoň, M. & Urbánek, M. Modeling of microfocused Brillouin light scattering spectra. Phys. Rev. B 110, 224428 (2024)

    work page 2024

  46. [49]

    Vaňatka, M. et al. Spin-Wave Dispersion Measurement by Variable-Gap Propagating Spin- Wave Spectroscopy. Phys. Rev. Appl. 16, 054033 (2021). 26

    work page 2021

  47. [50]

    & Ross, C

    Cho, E., Klyukin, K., Su, T., Kaczmarek, A. & Ross, C. A. Composition-Dependent Ferroelectricity of LuFeO3 Orthoferrite Thin Films. Advanced Electronic Materials 9, 2300059 (2023). 27 Supplemental Information: Contents Page Figures

    work page 2023

  48. [51]

    Extended Methods and Characterization 28 S1-S3

    work page

  49. [52]

    Seed layer and LDP examples 34 S4

    work page

  50. [53]

    Phase formation as a function of film stoichiometry 36 S5-S6

    work page

  51. [54]

    CNO Seed Layer 39 S7-S8

    work page

  52. [55]

    Fe-rich BYFO 43 S9-S12

    work page

  53. [56]

    Magnetic Anisotropy and Damping of Bi2.25Y0.75Fe5O12 Garnets 45 S13

    work page

  54. [57]

    Micro-Brillouin Light Scattering Analysis 47 S14-S17

    work page

  55. [58]

    Origin of magnetoelectric coupling leading to BLS frequency change 51 Supplemental References 53 28

    work page

  56. [59]

    (a) Spin coating of resist onto garnet substrate

    Extended Methods and Characterization Figure S1: Detailed fabrication pathway for the creation of LDPs using a perovskite seed. (a) Spin coating of resist onto garnet substrate. (b) Selective exposure of resist through EBL. (c) Removal of resist regions that were exposed during EBL. (d) Seed layer growth via PLD. (e) Liftoff to remove remaining resist and...

    work page

  57. [60]

    The growth of the seed layers of LDPs is critical to the creation of multiphase structures

    Seed layer and LDP examples Figure S1 shows the full sample fabrication process. The growth of the seed layers of LDPs is critical to the creation of multiphase structures. Figure S4a shows an example of a seed layer of STO deposited over a resist pattern consisting of 800 nm wide squares with 100 nm gaps and subsequently lifted off. Figure S4b,c shows th...

    work page

  58. [61]

    Phase formation and film stoichiometry A range of Y 3+XFe5-XO12 compositions (where X ranges from 0 to 1) were deposited on (111) GGG substrates to explore their structural and magnetic properties. A 382 nm thick film with a 3:5 Y:Fe cation ratio (stoichiometric YIG) grew as expected as a garnet evident by the (444) diffraction peak present in the HRXRD s...

    work page

  59. [62]

    Figure S7a,b show AFM images of a hybrid film of CNO and GO before and after O2 plasma etching, respectively (corresponding to the steps in Figure S2b,c respectively)

    CNO Seed Layer Figure S2 shows the sample fabrication process. Figure S7a,b show AFM images of a hybrid film of CNO and GO before and after O2 plasma etching, respectively (corresponding to the steps in Figure S2b,c respectively). The unetched film consists of approximately one layer of CNO and GO sheets on the substrate with some regions of overlapping s...

    work page

  60. [63]

    Fe-rich BYFO (Fe:BYFO) Further exploration of the electric field response of the Bi2.25Y0.75Fe5O12 thin films grown on LSMO seed layers was conducted via PFM (Figure S9). A small area (1.5 x 1.5 µm) was scanned and reveals that the majority of the surface is ferroelectric, as evidenced by the amplitude micrograph (Figure S9b) containing only a few black r...

    work page

  61. [64]

    Magnetic Anisotropy and Damping of Bi2.25Y0.75Fe5O12 Garnets Bi can be substituted in YIG across the range of compositions, BixY3-xFe5O12 although the material becomes unstable for the highest Bi contents and can only be formed as an epitaxial film. The room temperature saturation magnetization varies from 140 kA/m at x = 0 to 120 kA/m at x = 3, and the G...

    work page

  62. [65]

    Micro-Brillouin Light Scattering Analysis Thermal BLS spectra were acquired on 0.5 and 2.5 µm wide LDP garnet waveguides surrounded by perovskite (Figure S12b). In the case of the 2.5 µm wide waveguide, there are two clear spin wave bands at approximately 6.6 GHz and 18 GHz corresponding to the fundamental and first order perpendicular standing spin wave ...

    work page

  63. [66]

    Lazić, I., Bosch, E. G. T. & Lazar, S. Phase contrast STEM for thin samples: Integrated differential phase contrast. Ultramicroscopy 160, 265–280 (2016)

    work page 2016

  64. [67]

    & Lyu, H

    Gao, Z., Lyu, S. & Lyu, H. Frequency dependence on polarization switching measurement in ferroelectric capacitors. J. Semicond. 43, 014102–5 (2022)

    work page 2022

  65. [68]

    Wojewoda, O. et al. Observing high-k magnons with Mie-resonance-enhanced Brillouin light scattering. Commun Phys 6, 1–10 (2023)

    work page 2023

  66. [69]

    M., Anderson, M

    Lindsay, S. M., Anderson, M. W. & Sandercock, J. R. Construction and alignment of a high performance multipass vernier tandem Fabry–Perot interferometer. Review of Scientific Instruments 52, 1478–1486 (1981)

    work page 1981

  67. [70]

    Körber, L. et al. TetraX: Finite-Element Micromagnetic-Modeling Package. Rodare https://doi.org/10.14278/rodare.1418 (2022)

    work page doi:10.14278/rodare.1418 2022

  68. [71]

    & Kákay, A

    Körber, L., Quasebarth, G., Otto, A. & Kákay, A. Finite-element dynamic-matrix approach for spin-wave dispersions in magnonic waveguides with arbitrary cross section. AIP Advances 11, 095006 (2021)

    work page 2021

  69. [72]

    & Slavin, A

    Verba, R., Tiberkevich, V . & Slavin, A. Damping of linear spin-wave modes in magnetic nanostructures: Local, nonlocal, and coordinate-dependent damping. Phys. Rev. B 98, 104408 (2018)

    work page 2018

  70. [73]

    & Ross, C

    Su, T., Ning, S., Cho, E. & Ross, C. A. Magnetism and site occupancy in epitaxial Y-rich yttrium iron garnet films. Phys. Rev. Mater. 5, 094403 (2021)

    work page 2021

  71. [74]

    Hauser, C. et al. Yttrium Iron Garnet Thin Films with Very Low Damping Obtained by Recrystallization of Amorphous Material. Sci Rep 6, 20827 (2016). 54

    work page 2016

  72. [75]

    Kaczmarek, A. C. et al. Atomic order of rare earth ions in a complex oxide: a path to magnetotaxial anisotropy. Nat Commun 15, 5083 (2024)

    work page 2024

  73. [76]

    Lin, Y . et al. Bi-YIG ferrimagnetic insulator nanometer films with large perpendicular magnetic anisotropy and narrow ferromagnetic resonance linewidth. Journal of Magnetism and Magnetic Materials 496, 165886 (2020)

    work page 2020

  74. [77]

    & Kuanr, B

    Gurjar, G., Sharma, V ., Patnaik, S. & Kuanr, B. K. Control of magnetization dynamics by substrate orientation in YIG thin films. Mater. Res. Express 8, 066401 (2021)

    work page 2021

  75. [78]

    & Hossain, Z

    Kumar, R., Samantaray, B. & Hossain, Z. Ferromagnetic resonance studies of strain tuned Bi:YIG films. J. Phys.: Condens. Matter 31, 435802 (2019)

    work page 2019

  76. [79]

    Zhan, J. et al. Low Gilbert damping in Bi/In-doped YIG thin films with giant Faraday effect. Chinese Phys. B 33, 107505 (2024)

    work page 2024

  77. [80]

    Chang, H. et al. Nanometer-Thick Yttrium Iron Garnet Films With Extremely Low Damping. IEEE Magnetics Letters 5, 1–4 (2014)

    work page 2014

  78. [81]

    & Hossain, Z

    Lal, K., Kumar, R., Ghising, P., Samantaray, B. & Hossain, Z. Oblique magnetic anisotropy and domain texture in ${\mathrm{Bi}}_{3}{\mathrm{Fe}}_{5}{\mathrm{O}}_{12}$ films. Phys. Rev. B 108, 014401 (2023)

    work page 2023

  79. [82]

    & van Dijken, S

    Das, S., Mansell, R., Flajšman, L., Yao, L. & van Dijken, S. Perpendicular magnetic anisotropy in Bi-substituted yttrium iron garnet films. Journal of Applied Physics 134, 243902 (2023)

    work page 2023

  80. [83]

    Pulsed Laser Deposition of Substituted thin Garnet Films for Magnonic Applications

    Soumah, L. Pulsed Laser Deposition of Substituted thin Garnet Films for Magnonic Applications. (Université Paris Saclay (COmUE), 2019)

    work page 2019

Showing first 80 references.