Nonlinear magnetoelectric effects in Al-substituted strontium hexaferrite

Abstract This report is on the observation and theory of electric field E induced non-linear magnetoelectric (NLME) effects in single crystal platelets of ferrimagnetic M-type strontium aluminum hexagonal ferrite. Using microwave measurement techniques, it was found that a DC electric field along th...

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Autores principales:	Ying Liu, Maksym Popov, Igor Zavislyak, Hongwei Qu, T. Zhang, Jitao Zhang, M. R. Page, A. M. Balbashov, G. Srinivasan
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/907e9f112e0d48c9ac9683d7865bb0ed
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spelling	oai:doaj.org-article:907e9f112e0d48c9ac9683d7865bb0ed2021-12-02T13:39:55ZNonlinear magnetoelectric effects in Al-substituted strontium hexaferrite10.1038/s41598-021-88203-w2045-2322https://doaj.org/article/907e9f112e0d48c9ac9683d7865bb0ed2021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-88203-whttps://doaj.org/toc/2045-2322Abstract This report is on the observation and theory of electric field E induced non-linear magnetoelectric (NLME) effects in single crystal platelets of ferrimagnetic M-type strontium aluminum hexagonal ferrite. Using microwave measurement techniques, it was found that a DC electric field along the hexagonal c-axis results in significant changes in the saturation magnetization and uniaxial magneto-crystalline anisotropy field and these changes are proportional to the square of the applied static electric field. The NLME effects were present with or without an external bias magnetic field. The E-induced variation in magnetic order parameters is attributed to weakening of magnetic exchange and spin–orbit interactions since conduction electrons in the ferrite are effectively excluded from both interactions while being in transit from one Fe ion to another. We present a phenomenological theory which considers magneto-bielectric effects characterized by a quadratic term in electric field E in the free energy density. The coefficients for the NLME coupling terms have been calculated from experimental data and they do show variations with the Al substitution level and the largest rates of change of the saturation magnetization and anisotropy constant change with the applied power were observed for x = 0.4. It was also clear from the study that strength of the NLME effect does not depend on the amount Al substitution, but critically depends on the electrical conductivity of the sample with the highest NLME coefficients estimated for the sample with the highest conductivity. Results of this work are of importance for a new family of electric field tunable, miniature, high frequency ferrite devices.Ying LiuMaksym PopovIgor ZavislyakHongwei QuT. ZhangJitao ZhangM. R. PageA. M. BalbashovG. SrinivasanNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ying Liu Maksym Popov Igor Zavislyak Hongwei Qu T. Zhang Jitao Zhang M. R. Page A. M. Balbashov G. Srinivasan Nonlinear magnetoelectric effects in Al-substituted strontium hexaferrite
description	Abstract This report is on the observation and theory of electric field E induced non-linear magnetoelectric (NLME) effects in single crystal platelets of ferrimagnetic M-type strontium aluminum hexagonal ferrite. Using microwave measurement techniques, it was found that a DC electric field along the hexagonal c-axis results in significant changes in the saturation magnetization and uniaxial magneto-crystalline anisotropy field and these changes are proportional to the square of the applied static electric field. The NLME effects were present with or without an external bias magnetic field. The E-induced variation in magnetic order parameters is attributed to weakening of magnetic exchange and spin–orbit interactions since conduction electrons in the ferrite are effectively excluded from both interactions while being in transit from one Fe ion to another. We present a phenomenological theory which considers magneto-bielectric effects characterized by a quadratic term in electric field E in the free energy density. The coefficients for the NLME coupling terms have been calculated from experimental data and they do show variations with the Al substitution level and the largest rates of change of the saturation magnetization and anisotropy constant change with the applied power were observed for x = 0.4. It was also clear from the study that strength of the NLME effect does not depend on the amount Al substitution, but critically depends on the electrical conductivity of the sample with the highest NLME coefficients estimated for the sample with the highest conductivity. Results of this work are of importance for a new family of electric field tunable, miniature, high frequency ferrite devices.
format	article
author	Ying Liu Maksym Popov Igor Zavislyak Hongwei Qu T. Zhang Jitao Zhang M. R. Page A. M. Balbashov G. Srinivasan
author_facet	Ying Liu Maksym Popov Igor Zavislyak Hongwei Qu T. Zhang Jitao Zhang M. R. Page A. M. Balbashov G. Srinivasan
author_sort	Ying Liu
title	Nonlinear magnetoelectric effects in Al-substituted strontium hexaferrite
title_short	Nonlinear magnetoelectric effects in Al-substituted strontium hexaferrite
title_full	Nonlinear magnetoelectric effects in Al-substituted strontium hexaferrite
title_fullStr	Nonlinear magnetoelectric effects in Al-substituted strontium hexaferrite
title_full_unstemmed	Nonlinear magnetoelectric effects in Al-substituted strontium hexaferrite
title_sort	nonlinear magnetoelectric effects in al-substituted strontium hexaferrite
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/907e9f112e0d48c9ac9683d7865bb0ed
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Nonlinear magnetoelectric effects in Al-substituted strontium hexaferrite

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