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Journal articles on the topic 'Magneto-dielectric Properties'

Author: Grafiati

Published: 7 September 2023

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1

Yang, Ta-I., Rene N. C. Brown, Leo C. Kempel, and Peter Kofinas. "Magneto-dielectric properties of polymer– nanocomposites." Journal of Magnetism and Magnetic Materials 320, no. 21 (November 2008): 2714–20. http://dx.doi.org/10.1016/j.jmmm.2008.06.008.

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2

Sharma, Indu, Shruti Mahajan, Vishal Arora, Mehak Arora, Nitin Mahajan, Kanika Aggarwal, and Anupinder Singh. "Effect of Magnetic field on dielectric properties in PLT/BNCFO composites." Emerging Materials Research 12, no. 2 (June 1, 2023): 1–11. http://dx.doi.org/10.1680/jemmr.22.00183.

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The main goal of this study is to analyze the magnetic, dielectric, and magneto-dielectric characteristics of Pb1− x La x Ti1− x O 3 - (Ba1–3 x Nd2 x )4Co2Fe36O60 (where x = 0.25) composite material at various temperatures T1-T3 (i.e 1100°C ,1200°C, 1300°C respectively). The X-ray diffraction investigation has been introduced in order to pinpoint the creation of the U-type hexaferrite phase. SEM micrographs reveal that sample sintered at T2 reached the maximum value of grain size and the largest experimental density value of 6.14 g/cm3 due to the composite material's intensified grain growth. The magnetic investigations further indicate that the sample T2 achieved the highest remnant magnetization, measuring 1.550 emu/g, revealing the accuracy of the sintering temperature. The magneto-dielectric investigations demonstrate the presence of multiferroicity in all samples, and came to the conclusion that sample T2 exhibits the highest magneto-dielectric response of 41.99 at 1.2 Tesla and a magneto-dielectric coefficient (γ) of around 0.7609 g2/emu2. Numerous metrics, including nyquist plots, impedance, electrical modulus, dielectric constant, and conductivity, were carefully examined in order to determine the electrical properties of the proposed sample. It was found that sample T2 produced the enhanced results and had the right temperature for the substance to develop.

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3

Halder, Monalisa, Jinia Datta, Raja Mallick, Ranjita Sinha, Khusi Smriti, Chandan Kumar Raul, Shubhadip Atta, and Ajit Kumar Meikap. "Observation of Electrical, Dielectric and Magneto-dielectric Properties of Terbium Doped Bismuth Ferrite Nanoparticles above Room Temperature." International Journal of Innovative Research in Physics 3, no. 4 (July 4, 2022): 20–24. http://dx.doi.org/10.15864/ijiip.3403.

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The effect of rare earth transition metal (Tb) ions doping in A site of bismuth ferrite (BFO) nanoparticles are studied from electrical, dielectric and magneto-dielectric aspects. A detailed study on dielectric properties of the Tb doped bismuth ferrite nanoparticles is done over a wide temperature range in a frequency range of 20 Hz - 2 MHz. Observation on magneto-dielectric response of the sample is done at room temperature upon applying external transverse magnetic field.

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4

Singh, Gulab, H. P. Bhasker, R. P. Yadav, Aditya Kumar, Bushra Khan, Ashok Kumar, and Manoj K. Singh. "Magneto-dielectric and multiferroic properties in Bi0.95Yb0.05Fe0.95Co0.05O3." Physica Scripta 94, no. 6 (April 2, 2019): 065802. http://dx.doi.org/10.1088/1402-4896/ab03a5.

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5

Zuo, Xuzhong, Maolian Zhang, Enjie He, Peng Zhang, Jie Yang, Xuebin Zhu, and Jianming Dai. "Magnetic, dielectric, and magneto-dielectric properties of Aurivillius Bi7Fe2CrTi3O21 ceramic." Ceramics International 44, no. 5 (April 2018): 5319–26. http://dx.doi.org/10.1016/j.ceramint.2017.12.150.

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6

Bhoi, Krishnamayee, Dhiren K. Pradhan, K. Chandrakanta, Narendra Babu Simhachalam, A. K. Singh, P. N. Vishwakarma, A. Kumar, Philip D. Rack, and Dillip K. Pradhan. "Investigations of room temperature multiferroic and magneto-electric properties of (1-Φ) PZTFT-Φ CZFMO particulate composites." Journal of Applied Physics 133, no. 2 (January 14, 2023): 024101. http://dx.doi.org/10.1063/5.0120665.

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Multiferroic composites consisting of a single-phase multiferroic [0.6(PbZr0.53Ti0.47O3)-0.4(PbFe0.5Ta0.5)O3] as a matrix and a magnetostrictive phase (Co0.6Zn0.4Fe1.7Mn0.3O4) dispersed in the matrix are fabricated via hybrid synthesis technique. The structure and surface morphology studies using x-ray diffraction and field emission scanning electron microscopy techniques indicate the formation of 3-0 type particulate composites. Coexistence of soft-magnetic behavior and ferroelectric characteristics are confirmed for composites from magnetization vs magnetic field (M–H) and polarization vs electric field (P–E) measurements, respectively. Magneto-dielectric (MD) measurement shows significant changes in the dielectric properties with the application of a magnetic field, indicating the existence of strong MD behavior. The biquadratic nature of magneto-electric (ME) coupling is described by the Landau free energy equation arising from the strain transfer at the interfaces between the constituent phases. The direct magneto-electric voltage coefficient measurement also confirms very strong coupling between ferroelectricity and magnetism and supports the strain-mediated magneto-electric effect in composites. The Φ = 0.3 composite exhibits the maximum ME coefficient of 20.72 mV/cm Oe with MS = 24.62 emu/g, HC = 59.66 Oe, and piezoelectric coefficient value d33 = 19 pC/N. The strong magneto-electric effect along with low dielectric loss at room temperature in these composites suggests their suitability for multifunctional magneto-electric device applications such as magnetic sensors, etc.

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7

Chan, Kheng Chuan, Xiao Tian Liew, Ling Bing Kong, Zheng Wen Li, and Guo Qing Lin. "Ni1−xCoxFe1.98O4Ferrite Ceramics with Promising Magneto-Dielectric Properties." Journal of the American Ceramic Society 91, no. 12 (December 2008): 3937–42. http://dx.doi.org/10.1111/j.1551-2916.2008.02777.x.

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8

Akhtar, Abu Jahid, Abhisek Gupta, and Shyamal K. Saha. "Trap induced tunable unusual dielectric properties in transition metal doped reduced graphene oxide." RSC Advances 5, no. 13 (2015): 9594–99. http://dx.doi.org/10.1039/c4ra13387k.

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9

Hasan, Zaid A. "Effect Magneto – Optic on Ferromagnetic Nanoparticle Polymer Composite Films." NeuroQuantology 19, no. 6 (July 14, 2021): 25–29. http://dx.doi.org/10.14704/nq.2021.19.6.nq21063.

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Optical properties of a composite material made of ferromagnetic matel nanoparticles embedded in dielectric host are studied. A nonlinear dependence of the optical rotation on magnetic field resulting from the reorientation of nanoparticles is demonstrated. The data of optical properties finding were applied to the magneto – optic experimental data of nickel ferrite (NiFe2 O4) ferromagnetic nanoparticles embedded in polymer (PMMA) host. The magneto – optic is applied at wavelength (540 nm) and magnetic field intensity (450 m T), from result we found the affect magneto – optical on samples.

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10

Rather, Gowher Hameed, Mehraj ud Din Rather, Nazima Nazir, Afreen Ikram, Mohd Ikram, and Basharat Want. "Particulate multiferroic Ba0.99Tb0.02Ti0.99O3 – CoFe1.8Mn0.2O4 composites: Improved dielectric, ferroelectric and magneto-dielectric properties." Journal of Alloys and Compounds 887 (December 2021): 161446. http://dx.doi.org/10.1016/j.jallcom.2021.161446.

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11

Singh, Gulab, H. P. Bhasker, R. P. Yadav, Satish Kumar Mandal, Aditya Kumar, Bushra Khan, Ashok Kumar, and Manoj K. Singh. "Dielectric, magnetic and magneto-dielectric properties of (La, Co) co-doped BiFeO3." Physica Scripta 94, no. 12 (September 20, 2019): 125805. http://dx.doi.org/10.1088/1402-4896/ab354a.

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12

Mahapatra, A. S., A. Mitra, A. Mallick, A. Shaw, and P. K. Chakrabarti. "Structural, magnetic, dielectric and magneto-dielectric properties of (BaTiO3)0.70(Li0.3Zn0.4Fe2.3O4)0.30." Materials Research Bulletin 102 (June 2018): 226–34. http://dx.doi.org/10.1016/j.materresbull.2018.02.034.

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13

Khan, Bushra, Manoj K. Singh, Aditya Kumar, Arushi Pandey, Sushmita Dwivedi, Upendra Kumar, Surbhi Ramawat, Sumit Kukreti, Ambesh Dixit, and Somnath C. Roy. "Multiferroic, optical and magneto-dielectric properties with enhanced magneto-impedance characteristic of KBiFe2O5." Journal of Alloys and Compounds 893 (February 2022): 162225. http://dx.doi.org/10.1016/j.jallcom.2021.162225.

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14

YOKOTA, Takeshi, Shotaro MURATA, Takaaki KURIBAYASHI, and Manabu GOMI. "Magnetic and magneto-dielectric properties of magneto-electric field effect capacitor using Cr2O3." Journal of the Ceramic Society of Japan 116, no. 1359 (2008): 1204–7. http://dx.doi.org/10.2109/jcersj2.116.1204.

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15

Rana, Dhiraj Kumar, Suresh Kumar Singh, Shovan Kumar Kundu, Subir Roy, S. Angappane, and Soumen Basu. "Electrical and room temperature multiferroic properties of polyvinylidene fluoride nanocomposites doped with nickel ferrite nanoparticles." New Journal of Chemistry 43, no. 7 (2019): 3128–38. http://dx.doi.org/10.1039/c8nj04755c.

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16

Polyakov, V. V., Klaudia P. Polyakova, V. A. Seredkin, and Gennady S. Patrin. "Magneto-Optical Properties of Co/TiO₂ Layered Films." Solid State Phenomena 215 (April 2014): 254–58. http://dx.doi.org/10.4028/www.scientific.net/ssp.215.254.

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Spectral dependences of the polar Kerr effect in Co/TiO2multilayer films in the spectral range 400--1000 nm have been studied. It is shown that the sign, value, and shape of the magneto-optical spectrum depend on the thickness of a dielectric spacer and the number of layers in the structure. It has been established that the magneto-optical rotation in the Co/TiO2films considerably exceeds that in homogeneous Co films. The magneto-optical rotation attains the record value 2θk= 7.3 deg in the Co (5 nm)/ TiO2(17 nm) layered structure with the number of layer pairs n = 8 at a wavelength of 560 nm.

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17

Kong, L. B., Z. W. Li, G. Q. Lin, and Y. B. Gan. "Magneto-Dielectric Properties of Mg?Cu?Co Ferrite Ceramics: II. Electrical, Dielectric, and Magnetic Properties." Journal of the American Ceramic Society 90, no. 7 (July 2007): 2104–12. http://dx.doi.org/10.1111/j.1551-2916.2007.01691.x.

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18

Xiao, Zhuohao, Chuanhu Wang, Lie Liu, Zhihong Yang, and Ling Bing Kong. "Optimization of Ni0.95−xZnxCo0.05Fe1.90Mn0.02O4 ceramics with promising magneto-dielectric properties for VHF antenna miniaturization." Journal of Advanced Dielectrics 08, no. 01 (February 2018): 1850001. http://dx.doi.org/10.1142/s2010135x18500017.

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Magnetic, dielectric and DC conductive properties of Ni[Formula: see text]ZnxCo[Formula: see text]Fe[Formula: see text]Mn[Formula: see text]O4 (with [Formula: see text]-0.20 at an interval of 0.05) ferrite ceramics were studied, in order to develop magneto-dielectric materials with almost equal values of relative permeability and permittivity, for the miniaturization of HF (3–30[Formula: see text]MHz) and VHF (30–90[Formula: see text]MHz and 100–300[Formula: see text]MHz) antennas. The ferrite ceramics were prepared by using the conventional two-step sintering process. The real part of relative permeability is increased almost linearly with increasing concentration of Zn, while that of relative permittivity keeps nearly unchanged. It is found that promising magneto-dielectric materials, with close values of real permeability and permittivity over 30–90 MHz (VHF), can be obtained for the samples at Zn concentrations between [Formula: see text] and [Formula: see text].

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19

Kolodiazhnyi, Taras, and Hiroya Sakurai. "Electronic, thermoelectric, and magneto-dielectric properties of Ca1−xNaxCr2O4." Journal of Applied Physics 113, no. 22 (June 14, 2013): 224109. http://dx.doi.org/10.1063/1.4810855.

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20

Lin, Ying, Xiao Liu, Haibo Yang, Fen Wang, and Chun Liu. "Electromagnetic properties of laminated Ni0.5Ti0.5NbO4-Bi0.4Y2.6Fe5O12 magneto-dielectric composites." Journal of the European Ceramic Society 36, no. 14 (November 2016): 3363–68. http://dx.doi.org/10.1016/j.jeurceramsoc.2016.05.029.

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21

Rajan, Soumya, P. M. Mohammed Gazzali, Lidia Okrasa, and G. Chandrasekaran. "Multiferroic and magneto-dielectric properties in Fe doped BaTiO3." Journal of Materials Science: Materials in Electronics 29, no. 13 (May 2, 2018): 11215–28. http://dx.doi.org/10.1007/s10854-018-9208-8.

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22

Gevorgyan, Ashot H., Sergey S. Golik, Nikolay A. Vanyushkin, Ilya M. Efimov, Mushegh S. Rafayelyan, Hermine Gharagulyan, Tatevik M. Sarukhanyan, Meruzhan Z. Hautyunyan, and Gvidon K. Matinyan. "Magnetically Induced Transparency in Media with Helical Dichroic Structure." Materials 14, no. 9 (April 23, 2021): 2172. http://dx.doi.org/10.3390/ma14092172.

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In our paper, the magneto-optical properties of a dichroic cholesteric liquid crystal layer with large values of magneto-optical parameter g and low values of dielectric permittivity were investigated. The solutions of the dispersion equation and their peculiarities were investigated in detail. The specific properties of reflection, transmission, absorption, rotation, ellipticity spectra and also the spectra of ellipticity and azimuth of eigen polarization were investigated. The existence of a tunable linear and nonreciprocal transmission band was shown.

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23

Safdar, Amina, Ramiza Ali, Aneela Shahzad, and Jaala Mishal. "Structural and Dielectric Properties of ‘Mg’ Doped M-Type Strontium Hexa-Ferrites (SrFe<sub>12</sub>O<sub>19</sub>) Synthesized via Sol-Gel Method." Advanced Materials Research 1178 (July 25, 2023): 97–112. http://dx.doi.org/10.4028/p-as98b5.

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M-type hexagonal ferrites have wide range of applications in magnetic recording media, microwave devices, micro electrochemical systems, high frequency devices, magneto-optical devices and many more. In present research, M-type strontium hexagonal ferrites doped with ‘magnesium’ having chemical composition (SrMgxFe12-xO19) for x= 0.00, 0.05, 00.10, 0.15, 0.20, were synthesized to investigate the influence of rare earth metal doping on the structure and dielectric properties via sol-gel auto combustion technique. Molecular absorption/transmission, structural properties and dielectric response were investigated by Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD) and Dielectric measurements of ‘Mg’ doped strontium hexaferrites. X-ray diffraction analysis verified the magneto-plumbite structure. Crystal sizes were found in varying order for different concentrations of ‘Mg’ ranging from 12.357 to 15.375 nm. The FT-IR spectra exhibited higher frequency band (500–515.84 cm-1) indicating tetrahedral site’s vibrations of metallic cations and lower frequency band (385.35–375.16 cm-1) exhibiting octahedral sites due to metallic oxygen bond that confirmed the hexagonal structure. The resonance peaks were observed in dielectric constant, loss, tangent loss, AC conductivity, electric modulus and quality factor versus frequency graphs. The dielectric properties were found to be enhanced gradually by increasing concentration of magnesium. The best Q-factor was found for magnesium concentration (x=0.20). The dielectric parameters specify that these ferrite nanoparticles are good applicants for the higher frequency implementations.

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24

Zuo, X. Z., J. Yang, D. P. Song, B. Yuan, X. W. Tang, K. J. Zhang, X. B. Zhu, W. H. Song, J. M. Dai, and Y. P. Sun. "Magnetic, dielectric, and magneto-dielectric properties of rare-earth-substituted Aurivillius phase Bi6Fe1.4Co0.6Ti3O18." Journal of Applied Physics 116, no. 15 (October 21, 2014): 154102. http://dx.doi.org/10.1063/1.4898318.

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25

Zuo, Xuzhong, Enjie He, Zhenzhen Hui, Jin Bai, Jie Yang, Xuebin Zhu, and Jianming Dai. "Magnetic, dielectric and magneto-dielectric properties of Aurivillius phase Bi4.25Nd0.75FeTi2(NbCo)0.5O15 ceramics." Journal of Materials Science: Materials in Electronics 30, no. 17 (August 8, 2019): 16337–46. http://dx.doi.org/10.1007/s10854-019-02004-6.

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26

Hossain, M. D., A. T. M. K. Jamil, Md Sarowar Hossain, S. J. Ahmed, H. N. Das, R. Rashid, M. A. Hakim, and M. N. I. Khan. "Investigation on structure, thermodynamic and multifunctional properties of Ni–Zn–Co ferrite for Gd³⁺ substitution." RSC Advances 12, no. 8 (2022): 4656–71. http://dx.doi.org/10.1039/d1ra04762k.

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This study presents a modification of structure-dependent elastic, thermodynamic, magnetic, transport and magneto-dielectric properties of a Ni–Zn–Co ferrite tailored by Gd3+ substitution at the B-site replacing Fe3+ ions.

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27

Dzunuzovic, Adis, Mirjana Vijatovic-Petrovic, Nikola Ilic, Jelena Bobic, and Biljana Stojanovic. "Magneto-dielectric properties of ferrites and ferrite/ferroelectric multiferroic composites." Processing and Application of Ceramics 13, no. 1 (2019): 104–13. http://dx.doi.org/10.2298/pac1901104d.

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Ni-Zn ferrites, with the general formula Ni1-xZnxFe2O4 (x = 0.0, 0.3, 0.5, 0.7, 1.0), CoFe2O4, BaTiO3 and PbZr0.52Ti0.48O3 powders were synthesized by auto-combustion method. The composites were prepared by mixing the appropriate amounts of individual phases, pressing and conventional sintering. X-ray analysis, for individual phase and composites, indicated the formation of crystallized structure of NiZnFe2O4, BaTiO3 and PbZr0.52Ti0.48O3 without the presence of secondary phases or any impurities. SEM analyses indicated a formation of uniform grain distribution for ferromagnetic and ferroelectric phases and formation of two types of grains, polygonal and rounded, respectively. Magneto-dielectric effect was exhibited in all samples because of the applied stress occurring due to the piezomagnetic effect and the magnetic field induced the variation of the dielectric constant. For all samples the dielectric constant was higher in applied magnetic field. At the low frequency, the dispersion of dielectric losses appeared, while at the higher frequency the value of tan ? become constant (Maxwell-Wagner relaxation). Investigation of J-E relation between leakage and electric field revealed that both nickel zinc ferrite and composites have three different regions of conduction: region with ohmic conduction mechanism, region with the trap-controlled space charge limited current mechanism and region with space charge limited current mechanism.

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28

Polosan, Silviu, Paul Ganea, and Andrei Nitescu. "Structural, magneto-optical and dielectric properties of phosphate tellurite glasses." Materials Research Bulletin 143 (November 2021): 111455. http://dx.doi.org/10.1016/j.materresbull.2021.111455.

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29

Mao, Xiangyu, Hui Sun, Wei Wang, Xiaobing Chen, and Yalin Lu. "Ferromagnetic, ferroelectric properties, and magneto-dielectric effect of Bi4.25La0.75Fe0.5Co0.5Ti3O15 ceramics." Applied Physics Letters 102, no. 7 (February 18, 2013): 072904. http://dx.doi.org/10.1063/1.4793305.

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30

Shen, Hui, Dianyuan Yang, Xiaomei Lu, Fang Mei, Min Zhou, Xingyu Xu, Xianming Ren, Fengzhen Huang, and Jinsong Zhu. "Magnetic properties and enhanced magneto-dielectric effects in nanobased Bi2Fe4O9." Journal of Physics D: Applied Physics 51, no. 29 (June 28, 2018): 295002. http://dx.doi.org/10.1088/1361-6463/aacb70.

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31

Fechine, P. B. A., R. S. T. Moretzsohn, R. C. S. Costa, J. Derov, J. W. Stewart, A. J. Drehman, C. Junqueira, and A. S. B. Sombra. "Magneto-dielectric properties of the Y3Fe5O12and Gd3Fe5O12dielectric ferrite resonator antennas." Microwave and Optical Technology Letters 50, no. 11 (November 2008): 2852–57. http://dx.doi.org/10.1002/mop.23824.

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32

Wang Jian-Yuan, Bai Jian-Ying, Luo Bing-Cheng, Wang Shuan-Hu, Jin Ke-Xin, and Chen Chang-Le. "Magneto-induced polarization enhancement and magneto-dielectric properties in oxygen deficient La0.67Sr0.33MnO3-/BaTiO3 composite film." Acta Physica Sinica 67, no. 1 (2018): 017701. http://dx.doi.org/10.7498/aps.67.20172019.

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33

Sanida, A., S. G. Stavropoulos, Th Speliotis, and G. C. Psarras. "Magneto-Dielectric Behaviour of M-Type Hexaferrite/Polymer Nanocomposites." Materials 11, no. 12 (December 14, 2018): 2551. http://dx.doi.org/10.3390/ma11122551.

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In the present study two sets of nanocomposites consisting of an epoxy resin and BaFe12O19 or SrFe12O19 nanoparticles were successfully developed and characterized morphologically and structurally via scanning electron microscopy and X-ray diffraction spectra. The dielectric response of the nanocomposites was investigated by means of broadband dielectric spectroscopy and their magnetic properties were derived from magnetization tests. Experimental data imply that the incorporation of the ceramic nanoparticles enhances significantly the dielectric properties of the examined systems and their ability to store electrical energy. Dielectric spectra of all systems revealed the presence of three distinct relaxation mechanisms, which are attributed both to the polymer matrix and the nanoinclusions: Interfacial polarization, glass to rubber transition of the polymer matrix and the re-orientation of small polar side groups of the polymer chain. The magnetic measurements confirmed the ferromagnetic nature of the nanocomposites. The induced magnetic properties increase with the inclusion of hexaferrite nanoparticles. The nanocomposites with SrFe12O19 nanoparticles exhibit higher values of coercive field, magnetization, magnetic saturation and remanence magnetization. A magnetic transition was detected in the ZFC/FC curves in the case of the BaFe12O19/epoxy nanocomposites.

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34

Karmakar, Riju, Amit Kumar Das, Subhamay Pramanik, Probodh Kumar Kuiri, and Ajit Kumar Meikap. "Tunable dielectric properties and magneto-dielectric coupling of hematite based trap free flexible semiconductor." Journal of Alloys and Compounds 881 (November 2021): 160516. http://dx.doi.org/10.1016/j.jallcom.2021.160516.

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35

Khan, Bushra, Aditya Kumar, Preeti Yadav, Gulab Singh, Upendra Kumar, Ashok Kumar, and Manoj K. Singh. "Structural, dielectric, magnetic and magneto-dielectric properties of (1 − x)BiFeO3–(x)CaTiO3 composites." Journal of Materials Science: Materials in Electronics 32, no. 13 (June 15, 2021): 18012–27. http://dx.doi.org/10.1007/s10854-021-06344-0.

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36

Rajnak, Michal, Zan Wu, Bystrik Dolnik, Katarina Paulovicova, Jana Tothova, Roman Cimbala, Juraj Kurimský, et al. "Magnetic Field Effect on Thermal, Dielectric, and Viscous Properties of a Transformer Oil-Based Magnetic Nanofluid." Energies 12, no. 23 (November 28, 2019): 4532. http://dx.doi.org/10.3390/en12234532.

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Progress in electrical engineering puts a greater demand on the cooling and insulating properties of liquid media, such as transformer oils. To enhance their performance, researchers develop various nanofluids based on transformer oils. In this study, we focus on novel commercial transformer oil and a magnetic nanofluid containing iron oxide nanoparticles. Three key properties are experimentally investigated in this paper. Thermal conductivity was studied by a transient plane source method dependent on the magnetic volume fraction and external magnetic field. It is shown that the classical effective medium theory, such as the Maxwell model, fails to explain the obtained results. We highlight the importance of the magnetic field distribution and the location of the thermal conductivity sensor in the analysis of the anisotropic thermal conductivity. Dielectric permittivity of the magnetic nanofluid, dependent on electric field frequency and magnetic volume fraction, was measured by an LCR meter. The measurements were carried out in thin sample cells yielding unusual magneto-dielectric anisotropy, which was dependent on the magnetic volume fraction. Finally, the viscosity of the studied magnetic fluid was experimentally studied by means of a rheometer with a magneto-rheological device. The measurements proved the magneto-viscous effect, which intensifies with increasing magnetic volume fraction.

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37

Cheng, Zhi Hong, Feng Zhang, An Ping Huang, and Zhi Song Xiao. "Magneto-Dielectric Properties of Fe₃O₄/TiO₂/PTFE Composites and Antenna Simulation." Materials Science Forum 787 (April 2014): 352–56. http://dx.doi.org/10.4028/www.scientific.net/msf.787.352.

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In this paper, a novel composite of magneto-dielectric mixture Fe3O4/TiO2 filled polymer PTFE was synthesized for a compact antenna application. Magnetic permeability, dielectric permittivity and related loss were measured and optimized. A planar patch antenna performance based on these composites with a center frequency at 1 GHz was simulated. The simulated antenna performances such as impedance bandwidth and radiation efficiency indicated that the antenna fabricated by this proposed composite could exhibit a better electrical property than that of conventional antenna printed on dielectric material.

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38

Gan’shina, Elena, Erkin Kulatov, Leonard Golik, Zoya Kun’kova, Yurii Uspenskii, Georgy Zykov, Ye Yuan, and Shengqiang Zhou. "Ab-initio study of electronic and magneto-optical properties of InAs:Mn." EPJ Web of Conferences 185 (2018): 06008. http://dx.doi.org/10.1051/epjconf/201818506008.

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Energy difference between the ferromagnetic and antiferromagnetic collinear orderings has been calculated for the uniform and dimer Mn-pair geometries in order to find the ground state distribution of the Mn atoms in InAs host. We find the preference of the dimer ferromagnetic configuration of Mn dopants and an importance of optimizing the atomic site positions. The frequency-dependent optical and magneto-optical properties, namely the dielectric tensor (on-and off-diagonal components), the electron energy loss spectra, and the transversal Kerr effect (TKE), are calculated. Calculated TKE resonance in In1-xMnxAs (x=0.0625) is found to be in good agreement with corresponding experimental magneto-optical spectra. The origin of the large TKE is discussed.

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39

Veeramani, T., C. VENKATARAJU, V. PORKALAI, and R. SAGAYARAJ. "Effect of ZnO on the Structural and Magnetodielectric Properties of MgFe2O4 Nanocomposite Prepared by Sol-Gel Method." Asian Journal of Chemistry 35, no. 9 (August 31, 2023): 2069–77. http://dx.doi.org/10.14233/ajchem.2023.28041.

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Zinc oxide doped magnesium ferrite (Mg1-xZnxFe2O4) nanocomposite was synthesized using sol-gel method and demonstrated to have a cubic spinel structure, with a range of crystallite sizes (19-40 nm) and lattice constants (8.432-8.399 Å). The material was found to have two prominent vibrational modes for tetrahedral (446 cm–1) and octahedral (584 cm–1). The dielectric constant was higher at low frequencies and decreased at higher frequencies, while the saturation magnetization decreased (16 to 6 emu/g) gradually with an increase in Zn2+, likely due to the presence of non-magnetic Zn2+. The magneto-dielectric constant was found to increase with the magnetic field for MgFe2O4 and up to a magnetic field of 2000 Oe for the zinc magnesium nanocomposites, after which it decreased for higher magnetic fields. A positive and negative change in magneto-capacitance as a function of the magnetic field was also observed. The antibacterial activity suggests that the substitution of Zn2+ into magnesium ferrite can be an effective method for improving antibacterial activity, with the potential to damage the bacterial membrane and other components through positively charged ions and ROS generated by nanoparticles. Potential uses for this synthetic material include magneto-optical recording and magnetic biosensors.

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Новиков, В. Б., А. М. Ромашкина, Д. А. Езенкова, И. A. Родионов, К. Н. Афанасьев, А. В. Барышев, and Т. В. Мурзина. "Оптические эффекты в магнитоплазмонных кристаллах на основе 1D металл-диэлектрической решетки." Журнал технической физики 128, no. 9 (2020): 1369. http://dx.doi.org/10.21883/os.2020.09.49878.98-20.

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Optical and magneto-optical spectroscopy methods are used to study the properties of one-dimensional spatially-periodic structures formed by a dielectric grating covered with gold and permalloy films. We demonstrate that such structures reveal surface plasmon-polariton excitation with the resonant frequency that can be controlled by the geometry of the experiment. Modulation of the magneto-optical Kerr effect is attained in the spectral vicinity of the plasmon resonance, which is absent for the case of non-structured gold-Py bilayer.

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Gevorgyan, A. H., and S. S. Golik. "Features of magneto-optics of dichroic cholesteric liquid crystals." Computer Optics 45, no. 6 (November 2021): 839–47. http://dx.doi.org/10.18287/2412-6179-co-928.

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In this work, magneto-optical properties of a dichroic cholesteric liquid-crystal layer are theoretically investigated at large values of the magneto-optical parameter. Features of all solutions of the dispersion equation are studied in detail. Peculiarities of the reflection, transmission, absorption spectra and the influence of dielectric boundaries on them are investigated. Specific properties of the localization of light and magnetically induced transparency in dichroic cholesteric liquid crystals are considered. The study of the light localization features showed that the presence of an external magnetic field, as well as the presence of dielectric boundaries, led to the appearance of oscillations in the dependence of the intensity of the layer-confined energy on the coordinate of the axis directed along the cholesteric axis. A strong influence of the refractive index of isotropic half-spaces adjacent to a dichroic cholesteric liquid crystal layer on the optics of the layer under consideration is shown. In particular, magnetically induced transparency and diffraction transmission appear only at certain intervals of the refractive index of isotropic half-spaces.

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42

Bunoiu, Madalin, Eugen Mircea Anitas, Gabriel Pascu, Larisa Marina Elisabeth Chirigiu, and Ioan Bica. "Electrical and Magnetodielectric Properties of Magneto-Active Fabrics for Electromagnetic Shielding and Health Monitoring." International Journal of Molecular Sciences 21, no. 13 (July 6, 2020): 4785. http://dx.doi.org/10.3390/ijms21134785.

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An efficient, low-cost and environmental-friendly method to fabricate magneto-active fabrics (MAFs) based on cotton fibers soaked with silicone oil and iron oxide microfibers (mFe) at mass fractions 2 wt.%, 4 wt.% and 8 wt.% is presented. It is shown that mFe induce good magnetic properties in MAFs, which are subsequently used as dielectric materials for capacitor fabrication. The electrical properties of MAFs are investigated in a static magnetic field with intensities of 0 kA/m, 160 kA/m and 320 kA/m, superimposed on a medium-frequency electric field. The influence of mFe on the electrical capacitance and dielectric loss tangent is determined, and it can be observed that the electrical conductivity, dielectric relaxation times and magnetodielectric effects are sensibly influenced by the applied magnetic and electric fields. The results indicate that the MAFs have electrical properties which could be useful for protection against electromagnetic pollution or for health monitoring.

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Arora, Mehak, Shubhpreet Kaur, Sunil Kumar, Vishal Arora, Indu Sharma, Sarabjit Singh, Mandeep Singh, and Anupinder Singh. "Dielectric and Magneto-dielectric properties of GdFeO3 modified PbTiO3 nanofibrous mats obtained through electrospinning technique." Materials Science and Engineering: B 296 (October 2023): 116702. http://dx.doi.org/10.1016/j.mseb.2023.116702.

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Mallmann, E. J. J., J. C. Goes, S. D. Figueiro, N. M. P. S. Ricardo, J. C. Denardin, A. S. B. Sombra, F. J. N. Maia, S. E. Mazzeto, and P. B. A. Fechine. "Microstructure and magneto-dielectric properties of the chitosan/gelatin-YIG biocomposites." Express Polymer Letters 5, no. 12 (2011): 1041–49. http://dx.doi.org/10.3144/expresspolymlett.2011.102.

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Kumar, Manish, S. Shankar, G. D. Dwivedi, A. Anshul, O. P. Thakur, and Anup K. Ghosh. "Magneto-dielectric coupling and transport properties of the ferromagnetic-BaTiO3 composites." Applied Physics Letters 106, no. 7 (February 16, 2015): 072903. http://dx.doi.org/10.1063/1.4909553.

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Jadav, Mudra, and S. P. Bhatnagar. "Tunable magneto-dielectric properties of magnetic fluid at radio-microwave frequencies." Journal of Magnetism and Magnetic Materials 498 (March 2020): 166127. http://dx.doi.org/10.1016/j.jmmm.2019.166127.

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Pandya, Rutvi J., Sushant Zinzuvadiya, Poornima Sengunthar, Shivangi S. Patel, Nisha Thankachen, and U. S. Joshi. "Microstructural, dielectric, magneto-electric and optical properties of single phase Ca3CoMnO6." Physica B: Condensed Matter 601 (January 2021): 412656. http://dx.doi.org/10.1016/j.physb.2020.412656.

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Gal, Manan, Keval Gadani, V. G. Shrimali, Bhargav Rajyaguru, Alpa Zankat, Hardik Gohil, S. B. Kansara, P. S. Solanki, and N. A. Shah. "Investigation on Magneto Dielectric Properties of Y0.95Sr0.05MnO3/SNTO Thin Film Device." Materials Today: Proceedings 17 (2019): 288–94. http://dx.doi.org/10.1016/j.matpr.2019.06.432.

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Strelniker, Y. M., and D. J. Bergman. "Magneto-optical properties of metal-dielectric composites with a periodic microstructure." European Physical Journal Applied Physics 7, no. 1 (July 1999): 19–24. http://dx.doi.org/10.1051/epjap:1999194.

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Bhowmik, R. N., and Abdul Gaffar Lone. "Dielectric properties of α-Fe1.6Ga0.4O3 oxide: A promising magneto-electric material." Journal of Alloys and Compounds 680 (September 2016): 31–42. http://dx.doi.org/10.1016/j.jallcom.2016.04.058.

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