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arxiv: 1907.05908 · v1 · pith:RE5BUGB7new · submitted 2019-07-12 · ⚛️ physics.app-ph · physics.ins-det

New method for characterization of magnetic nanoparticles by scanning magnetic microscopy

Jefferson F. D. F. Araujo , Tahir , Soudabeh Arsalani , Fernando L. Freire Jr. , Gino Mariotto , Marco Cremona , Leonardo A. F. Mendoza , Cleanio Luz-Lima
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Tommaso Del Rosso Oswaldo Baffa Antonio C. Bruno
This is my paper

Pith reviewed 2026-05-24 21:55 UTC · model grok-4.3

classification ⚛️ physics.app-ph physics.ins-det
keywords magneticmagnetizationmicroscopyobtainedcharacterizationcurvesmeasurementsmethod
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The pith

Scanning magnetic microscopy on tens-of-microgram samples measures iron oxide nanoparticle magnetization with errors of 0.18 Am2/kg in saturation and 0.6 Am2/kg in remanence.

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

The paper presents a method that deposits a small sample of colloidal iron oxide nanoparticles and uses scanning magnetic microscopy to record its magnetization curve. Results are compared directly to data from commercial magnetometers on the same materials, yielding the stated error levels. Nanoparticle size distributions extracted from the curves match independent transmission electron microscopy measurements. The approach is described as applicable to bulk, microstructured, and nanostructured materials and is extended to full hysteresis-loop recording. This enables magnetic characterization when only very small quantities of material are available.

Core claim

Scanning magnetic microscopy applied to a deposited sample of mass on the order of tens of micrograms produces magnetization curves for iron oxide nanoparticles whose saturation and remanent magnetization values agree with standard magnetometer results to within 0.18 Am2/kg and 0.6 Am2/kg respectively; the average particle sizes inferred from those curves are consistent with transmission electron microscopy determinations.

What carries the argument

Scanning magnetic microscopy signal obtained from a small deposited sample, converted directly into a magnetization curve without additional geometric corrections.

If this is right

  • The method applies to bulk materials, microstructures, and nanostructures alike.
  • Full hysteresis loops can be recorded, enabling more accurate overall nanoparticle size estimation.
  • Size distributions derived from the curves agree with those obtained by transmission electron microscopy.
  • The technique provides an alternative to commercial magnetometers when sample mass is limited to tens of micrograms.

Where Pith is reading between the lines

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

  • The method could be used on rare or costly nanoparticle batches where preparing larger specimens is impractical.
  • Combining the magnetic scan with simultaneous optical or topographic imaging on the same deposited spot would allow direct correlation of magnetic response with local morphology.
  • Extending the scan to arrays of individually deposited micro-droplets might enable high-throughput screening of synthesis conditions.
  • The approach might be adapted to measure temperature-dependent magnetization on the same small sample by adding a temperature stage.
  • pacs
  • msc
  • keywords
  • feed_headline

Load-bearing premise

The measured scanning magnetic microscopy signal from the deposited microgram-scale sample corresponds quantitatively to the nanoparticles' intrinsic magnetization.

What would settle it

Repeating the SMM measurement on the identical microgram sample while deliberately varying probe-to-sample distance or substrate material and checking whether the extracted saturation magnetization remains within the reported 0.18 Am2/kg error bound.

Figures

Figures reproduced from arXiv: 1907.05908 by Antonio C. Bruno, Cleanio Luz-Lima, Fernando L. Freire Jr., Gino Mariotto, Jefferson F. D. F. Araujo, Leonardo A. F. Mendoza, Marco Cremona, Oswaldo Baffa, Soudabeh Arsalani, Tahir, Tommaso Del Rosso.

Figure 1
Figure 1. Figure 1: (a) Scanning magnetic microscope. (b) Photo of the sample holder, where it was attached the print of the name PUC-Rio. (c) Experimental map made in scanning magnetic microscope, applying a field of 20 mT. Gradiometer is designed to attenuate the applied field, thereby increasing the dynamic range of the instrument and enabling operation under strong applied fields. However, the gradiometer can also attenua… view at source ↗
Figure 2
Figure 2. Figure 2: Magnetic maps of the samples at 500 mT. (a) Magnetic map of the induced field for a rectangular glass sample, 2.5 mm x 1.3 mm in size. (b) Map of a 2.5-mm-diameter quartz disc. (c) Magnetic map of the induced field for a rectangular acrylic sample, 1.7 x 0.9 mm in size. (d) The magnetization results obtained after the modeling process. To quantify these results in terms of magnetization and to aid in the s… view at source ↗
Figure 4
Figure 4. Figure 4: (a) Image of the acrylic sample holder, which is square-shaped with a side length of 1.7 mm, used to characterize the magnetic NPs in the center of the 400 x 400 µm cylindrical cavity. (b) Magnetic map of ~50 µg magnetic Fe3O4 NPs produced by co-precipitation and placed in the cylindrical cavity. (c) Results obtained along one axis in the presence of a 420 mT applied field. The S1 path passes through the c… view at source ↗
Figure 5
Figure 5. Figure 5: Maps of a 2.1 mm x 2.1 mm area surrounding a cylindrical cavity containing a few tens of µg of magnetic NPs as the applied field varies from 500 mT to - 500 mT. 500 mT 400 mT 300 mT 260 mT 230 mT 140 mT 70 mT 0 mT -70 mT -140 mT -230 mT -260 mT -300 mT -400 mT -500 mT [PITH_FULL_IMAGE:figures/full_fig_p010_5.png] view at source ↗
Figure 6
Figure 6. Figure 6: (a) Several curves of the induced magnetic field of the sample; the blue curves were obtained in the presence of a positive magnetic field, and the red curves were obtained in the presence of a negative magnetic field. (b) Comparison of the theoretical results (solid black curve) and the values obtained from the induced field of the sample (blue circles). (c) Comparison of the magnetization results obtaine… view at source ↗
Figure 7
Figure 7. Figure 7: (a) Experimental mapping applying 20 mT. (b) Map obtained through the theoretical model of a current cylinder. (c) Subtraction of the experimental map by the theoretical. (d) Comparison of the magnetization results obtained using our technique (blue circles) and the values obtained for the same nanoparticle sample using a commercial magnetometer (MPMS SQUID, Quantum Design Inc.) (solid red curve). 5.3 Aver… view at source ↗
read the original abstract

In this paper, we present a new method for the magnetic characterization of bulk materials, microstructures, and nanostructures. We investigated the magnetic and morphological properties of two colloidal dispersions of iron oxide (Fe3O4) magnetic nanoparticles (MNPs), synthesized by chemical precipitation (co-precipitation) and pulsed laser ablation (PLA) in liquid, by scanning magnetic microscopy (SMM) applied to a small sample with mass on the order of tens of {\mu}g. We evaluated the performance of this technique by comparing magnetization curves and measurements obtained with commercial magnetometers, considered standard. The errors obtained for the saturation and remanent magnetization were approximately 0.18 Am2/kg and 0.6 Am2/kg, respectively. The average size distribution of the NPs estimated from the magnetization curve measurements is consistent with the results obtained by traditional transmission electron microscopy (TEM). The technique can be extended to measure and analyze magnetization curves (hysteresis loops), thus enabling an even more accurate estimation of overall NP sizes.

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 / 1 minor

Summary. The manuscript presents a new method for magnetic characterization of bulk, micro-, and nanostructures using scanning magnetic microscopy (SMM) applied to small deposited samples (~tens of μg) of two Fe3O4 nanoparticle colloids (synthesized by co-precipitation and pulsed laser ablation). Magnetization curves obtained via SMM are compared to those from commercial magnetometers, yielding reported errors of ~0.18 Am²/kg for saturation magnetization and ~0.6 Am²/kg for remanent magnetization; nanoparticle size distributions extracted from the curves are stated to be consistent with TEM results. The technique is proposed for extension to full hysteresis-loop analysis.

Significance. If the SMM-to-magnetization conversion can be shown to introduce only the quoted errors after accounting for geometry and distance effects, the approach would enable quantitative magnetic measurements on sample masses far below those required by standard VSM/SQUID instruments, which is potentially valuable for limited-quantity nanostructures. The direct numerical comparison to independent commercial data (rather than self-referential fitting) is a positive feature.

major comments (2)
  1. [Abstract] Abstract: The headline error magnitudes (0.18 Am²/kg saturation, 0.6 Am²/kg remanent) and the TEM-consistency claim presuppose that the SMM voltage map on a deposited sample yields the intrinsic M(H) curve after only a global scaling factor. No equation, calibration curve, or error-propagation analysis is supplied to bound the systematic contributions from probe-sample distance, substrate stray fields, or finite scan-area integration; a 10–20 μm distance variation would rescale the extracted moment by an amount comparable to the quoted errors.
  2. [Abstract / Methods] The central validation rests on numerical agreement with commercial magnetometer data, yet the manuscript provides neither the raw SMM maps, the explicit form of the SMM-to-magnetization conversion factor, nor any experimental determination of the geometric prefactors. Without these, the load-bearing assumption that geometric corrections are negligible cannot be evaluated.
minor comments (1)
  1. [Abstract] The abstract states numerical error values and TEM consistency but does not reference any accompanying figures, tables, or supplementary data that would allow the reader to inspect the underlying magnetization curves or size-distribution histograms.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for their thorough review and valuable comments on our manuscript. We have carefully considered the major comments and will revise the manuscript to provide the requested details on the SMM-to-magnetization conversion and validation data. Below we respond point by point.

read point-by-point responses

  1. Referee: [Abstract] Abstract: The headline error magnitudes (0.18 Am²/kg saturation, 0.6 Am²/kg remanent) and the TEM-consistency claim presuppose that the SMM voltage map on a deposited sample yields the intrinsic M(H) curve after only a global scaling factor. No equation, calibration curve, or error-propagation analysis is supplied to bound the systematic contributions from probe-sample distance, substrate stray fields, or finite scan-area integration; a 10–20 μm distance variation would rescale the extracted moment by an amount comparable to the quoted errors.

    Authors: We agree with the referee that additional details are needed to support the claims in the abstract. The full manuscript describes the conversion procedure in the Methods section, but we will revise the abstract and add an explicit equation for the SMM-to-magnetization conversion, along with a calibration curve and error-propagation analysis in a new subsection. This will demonstrate how the systematic effects from distance variation and other factors are accounted for in the reported errors. revision: yes

  2. Referee: [Abstract / Methods] The central validation rests on numerical agreement with commercial magnetometer data, yet the manuscript provides neither the raw SMM maps, the explicit form of the SMM-to-magnetization conversion factor, nor any experimental determination of the geometric prefactors. Without these, the load-bearing assumption that geometric corrections are negligible cannot be evaluated.

    Authors: We acknowledge that the explicit conversion factor and raw data presentation could be improved for clarity. In the revised version, we will provide the explicit mathematical form of the conversion factor, describe the experimental calibration used to determine the geometric prefactors, and include representative raw SMM voltage maps (with the processed magnetization curves) in the supplementary material. This will enable independent evaluation of the geometric corrections. revision: yes

Circularity Check

0 steps flagged

No significant circularity; validation uses independent external benchmarks

full rationale

The paper presents a new SMM-based method for MNPs and evaluates performance via direct comparison of magnetization curves to commercial magnetometers (VSM/SQUID), reporting specific errors (0.18 Am2/kg sat., 0.6 Am2/kg rem.) and TEM consistency for size distribution. No load-bearing step reduces a claimed result to a fitted parameter, self-citation, or input by construction; the mapping from SMM voltage to M(H) is treated as a calibrated measurement whose accuracy is checked against separate instruments rather than derived tautologically from the same data. The derivation chain is therefore self-contained against external references.

Axiom & Free-Parameter Ledger

1 free parameters · 1 axioms · 0 invented entities

The work rests on standard electromagnetic measurement principles plus an implicit calibration step to convert SMM signals into absolute magnetization units; no new entities are postulated.

free parameters (1)
  • SMM-to-magnetization conversion factor
    Required to report absolute values in Am2/kg; must be determined from known standards or reference samples.
axioms (1)
  • domain assumption The magnetic moment of the nanoparticle ensemble produces a detectable stray field that scales linearly with sample magnetization under the probe geometry used.
    Invoked when interpreting raw SMM scans as magnetization curves.

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Reference graph

Works this paper leans on

30 extracted references · 30 canonical work pages

  1. [1]

    Fast fabrication of epoxy-functionalized magnetic polymer core-shell microspheres using glycidyl methacrylate as monomer via photo-initiated miniemulsion polymerization

    Dou, J.; Zhang, Q.; Ma, M.; Gu. Fast fabrication of epoxy-functionalized magnetic polymer core-shell microspheres using glycidyl methacrylate as monomer via photo-initiated miniemulsion polymerization. J. J. Magn. Magn. Mater. , 2012 , 324 , 3078-3082. doi: 10.1016/j.jmmm.2012.05.005

    work page doi:10.1016/j.jmmm.2012.05.005 2012

  2. [2]

    S.; Saw, W.P

    Boon, M. S.; Saw, W.P. S.; Mariatti, M. Magnetic, d ielectric and thermal stability of Ni–Zn ferrite-epo xy composite thin films for electronic applications. J. Magn. Magn. Mater., 2012 , 324, 755-776. doi: 10.1016/j.jmmm.2011.09.009

    work page doi:10.1016/j.jmmm.2011.09.009 2012

  3. [3]

    Measuring magnetic anisotropy with a rotatable ac electromagnet

    Wang, R.; Nie, S.; Zhao, J.; Ji, Y. Measuring magnetic anisotropy with a rotatable ac electromagnet. Measument , 2016 , 79, 15- 19. doi: 10.1016/j.measurement.2015.10.032

    work page doi:10.1016/j.measurement.2015.10.032 2016

  4. [4]

    Yeh, Y.; Jin, J.; Li, C.; Lue, J. T. The electric an d magnetic properties of Co and Fe films percept fr om the Technique TEM Magnetic DLS Co-precipitation 12 nm 9 nm 106 nm Laser ablation 4 nm 4 nm 86 nm 15 coexistence of ferromagnetic and microstrip resonan ce for a T-type microstrip. Measument , 2009 , 42, 290-297. doi: 10.1016/j.measurement.2008.06.012

    work page doi:10.1016/j.measurement.2008.06.012 2009

  5. [5]

    H.; Na, W.; Jang, J

    Noh, S. H.; Na, W.; Jang, J. T.; Lee, J. H.; Lee, E. J.; Moon, S. H.; Lim, Y.; Shin, J. S.; Cheon, J. Nanoscale Magnetism Control via Surface and Exchange Anisotropy for Opt imized Ferrimagnetic Hysteresis. Nano Lett., 2012 , 12, 3716–3721. doi: 10.1021/nl301499u

    work page doi:10.1021/nl301499u 2012

  6. [6]

    Magnetic nanoparticles in cancer d iagnosis, drug delivery and treatment

    Wu, M; Huang, S. Magnetic nanoparticles in cancer d iagnosis, drug delivery and treatment. Molecular and Clinical Oncology , 2017 , 7, 738-746. doi: 10.3892/mco.2017.1399

    work page doi:10.3892/mco.2017.1399 2017

  7. [7]

    Y.; Bishop, M.; Zheng, B.; Ferguson, R

    Yu, E. Y.; Bishop, M.; Zheng, B.; Ferguson, R. M.; Kha ndhar, A. P.; Kemp, S. J.; Krishnan, K. M.; Goodwi ll, P. W.; Conolly, S. M. Magnetic Particle Imaging: A Nov el in Vivo Imaging Platform for Cancer Detection. Nano Lett. , 2017 , 17, 1648-1654. doi: 10.1021/acs.nanolett.6b04865

    work page doi:10.1021/acs.nanolett.6b04865 2017

  8. [8]

    J.; Silveira, M

    Arsalani, S.; Guidelli, E. J.; Silveira, M. A.; Sal mon, C. E.G.; Araujo, J. F.D.F.; Bruno, A. C.; Baff a, O. Magnetic Fe3O4 Nanoparticles Coated by Natural Rubber Latex as MRI Contrast Agent. J. Magn. Magn. Mater. , 2019 , 475, 458-464. doi: 10.1016/j.jmmm.2018.11.132

    work page doi:10.1016/j.jmmm.2018.11.132 2019

  9. [9]

    J.; Silveira, M

    Arsalani, S.; Guidelli, E. J.; Silveira, M. A.; Araujo, J. F.D.F.; Bruno, A. C.; Baffa, O. Green Synthesis and Surface Modification of Iron Oxide Nanoparticles with Enhan ced Magnetization Using Natural Rubber Latex. ACS Sustainable Chem.Eng. , 2018 , 11, 13756-13765. doi: 10.1021/acssuschemeng.8b01689

    work page doi:10.1021/acssuschemeng.8b01689 2018

  10. [10]

    E.; Ono, R.; Cobos, M

    Pottker, W. E.; Ono, R.; Cobos, M. A.; Hernando, A.; Araujo, J. F. D. F.; Bruno, A. C.; Lourenço, S. A.; Longo, E.; La Porta, F. A. Influence of order-disorder effects on the magnetic and optical properties of NiFe2O4 nanoparticles. Ceram. Int. , 2018 , 44, 17290-17297. doi: 10.1016/j.ceramint.2018.06.190

    work page doi:10.1016/j.ceramint.2018.06.190 2018

  11. [11]

    L.; Wade, B

    Courtney-Davies, L.; Zhu, Z.; Ciobanu, C. L.; Wade, B. P.; Cook, N. J.; Ehrig, K.; Cabral, A. R.; Kenne dy, A. Matrix-Matched Iron-Oxide Laser Ablation ICP-MS U–P b Geochronology Using Mixed Solution Standards. Minerals , 2016 , 6, 1-17. doi: 10.3390/min6030085

    work page doi:10.3390/min6030085 2016

  12. [12]

    L.; Tavárez, S.; González-Sánchez, Z

    Martínez-Rodriguez, N. L.; Tavárez, S.; González-Sánchez, Z. I.; In vitrotoxicity assessment of zinc and nickel ferrite nanoparticles in humanerythrocytes and peripheral blood mononuclear cell. Toxicology in Vitro , 2019 , 57, 54-61. doi: 10.1016/j.tiv.2019.02.011

    work page doi:10.1016/j.tiv.2019.02.011 2019

  13. [13]

    F.D.F; Pereira, J.M.B.; Bruno, A

    Araujo, J. F.D.F; Pereira, J.M.B.; Bruno, A. C. Ass embling a magnetometer for measuring the magnetic properties of iron oxide microparticles in the clas sroom laboratory. Am. J. Phys., 2019 , 87, 471-475. doi: 10.1119/1.5100944

    work page doi:10.1119/1.5100944 2019

  14. [14]

    F.D.F.; Costa, M

    Araujo, J. F.D.F.; Costa, M. C.; Louro, S. R.W.; Br uno, A.C.; A portable Hall magnetometer probe for characterization of magnetic iron oxide nanoparticl es. J. Magn. Magn. Mater. 2017 , 426, 159–162. doi: 10.1016/j.jmmm.2016.11.083

    work page doi:10.1016/j.jmmm.2016.11.083 2017

  15. [15]

    Araujo, J. F. D. F.; Bruno, A.C.; Louro, S. R. W. V ersatile magnetometer assembly for characterizing m agnetic properties of nanoparticles. Rev. Sci. Instrum., 2015 , 85, 105103-7. doi: 10.1063/1.4931989

    work page doi:10.1063/1.4931989 2015

  16. [16]

    Pereira, J. M. B.; Pacheco, C. J.; Arenas, M. P.; Araujo, J. F. D. F.; Pereira, G. R.; Bruno, A. C. Novel scanning dc- susceptometer for characterization of heat-resistant steels with different states of aging. J. Magn. Magn. Mater., 2017 , 442, 311–318. doi: 10.1016/j.jmmm.2017.07.004

    work page doi:10.1016/j.jmmm.2017.07.004 2017

  17. [17]

    Araujo, J. F. D. F.; Vieira, D. R. P.; Osorio, F.; Pöttker, W. E.; Porta, F. A.; Presa, P.; Perez, G.; Bruno, A. C. Versatile Hall magnetometer with variable sensitivity assembl y for characterization of the magnetic properties o f nanoparticles. J. Magn. Magn. Mater. 2019 , 489, 165431–165431. doi: 10.1016/j.jmmm.2019.165431

    work page doi:10.1016/j.jmmm.2019.165431 2019

  18. [18]

    Chara cterization of magnetic nanoparticles by a modular Hall magnetometer

    Araujo, J.F.D.F.; Bruno, A.C.; Carvalho, H.R. Chara cterization of magnetic nanoparticles by a modular Hall magnetometer. J. Magn. Magn. Mater. 2010 , 322, 2806–2809. doi: 10.1016/j.jmmm.2010.04.034

    work page doi:10.1016/j.jmmm.2010.04.034 2010

  19. [19]

    Araujo, J. F. D. F.; Pereira, J. M. B. A practical and automated Hall magnetometer for characterizatio n of magnetic materials. Mod. Inst. 2010 , 4, 43-53. doi: 10.4236/mi.2015.44005

    work page doi:10.4236/mi.2015.44005 2010

  20. [20]

    Del Rosso, T.; Louro, S. R. W.; Deepak, F. L.; Roma ni, E. C.; Zaman, Q.; Pandoli; Cremona, M.; Freire Junior, F. L.; De Buele, P.; De St. Pierre, T.; Aucelio, R. Q. ; Mariotto, G.; Gemini-Piperni, S.; Ribeiro, A. R.; Landi, S. M.; Magalhães, A. Biocompatible Au@Carbynoid/Pluronic-F 127 nanocomposites synthesized by pulsed laser ablation assisted CO 2 rec...

    work page doi:10.1016/j.apsusc.2018.02.007 2018

  21. [21]

    W.; Heidersbach, R

    Thibeau, R.J.; Brown, C. W.; Heidersbach, R. H. Raman Spectra of Possible Corrosion Products of Iron. Applied Spectroscopy, 1978 , 32, 532–535. doi:10.1366/000370278774330739

    work page doi:10.1366/000370278774330739 1978

  22. [22]

    Faria, D. L. A.; Silva, S. V.; Oliveira, M. T. Raman microspectroscopy of some iron oxides and oxyhydroxides J. Raman Spectrosc , 1997 , 28, 873–878. doi: 10.1002/(SICI)1097-4555(199711)28:11<873::AID-JRS177>3.0.CO;2-B

    work page doi:10.1002/(sici)1097-4555(199711)28:11 1997

  23. [23]

    Hyperfine Interactions , 1998 , 112, 59–65

    Oh, S.J., Cook, D.C., Townsend, H.E., Characterization of iron-oxides commonly formed as corrosion products on steel . Hyperfine Interactions , 1998 , 112, 59–65. doi: 10.1023/A:10110763085

    work page doi:10.1023/a:10110763085 1998

  24. [24]

    A.; de Waal, D

    Legodi, M. A.; de Waal, D. The preparation of magnetite, goethite, hematite and maghemite of pigment quality from mill scale iron waste. Dyes and Pigments , 2007 , 74, 161–168. doi:10.1016/j.dyepig.2006.01.038

    work page doi:10.1016/j.dyepig.2006.01.038 2007

  25. [25]

    Raman spectroscopy of iron oxides and ( oxy) hydroxides at low power laser and possible applications in environmental magnetic studies

    Hanesch, M. Raman spectroscopy of iron oxides and ( oxy) hydroxides at low power laser and possible applications in environmental magnetic studies. Geophysical Journal International , 2009 , 177, 941–948. doi: 10.1111/j.1365-246X.2009.04122.x 16

    work page doi:10.1111/j.1365-246x.2009.04122.x 2009

  26. [26]

    N.; Lazor, P

    Shebanova, O. N.; Lazor, P. Raman spectroscopic stu dy of magnetite (FeFe2O4): a new assignment for the vibrational spectrum. Journal of Solid State Chemistry, 2003 , 174, 424–430. doi: 10.1016/S0022-4596(03)00294-9

    work page doi:10.1016/s0022-4596(03)00294-9 2003

  27. [27]

    D.; Graham, C

    Cullity, B. D.; Graham, C. D. Introduction to Magnetic Materials (IEEE Press, NJ, 2009), p. 391

    work page 2009

  28. [28]

    J.; Özdemir, Ö

    Dunlop, D. J.; Özdemir, Ö. Rock Magnetism (Cambridge University Press, UK, 1997), p. 51

    work page 1997

  29. [29]

    Two-color surface plasmon resonance nanos izer for gold nanoparticles, Opt

    Zaman, Q.; Souza, J.; Pandoli, O.; Costa, K.; Dmitri ev, V.; Fulvio, D.; Cremona, M.; Aucelio, R.; Fonte s, G.; Del Rosso, T. Two-color surface plasmon resonance nanos izer for gold nanoparticles, Opt. Express, 2019 , 27, 3200-

    work page 2019

  30. [30]

    doi: 10.1364/OE.27.003200

    work page doi:10.1364/oe.27.003200