Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/85428
Type: Artigo
Title: Room temperature nonlinear magnetoelectric effect in lead-free and Nb-doped AlFeO3 compositions
Author: Cótica, L. F.
Santos, G. M.
Freitas, V. F.
Coelho, A. A.
Pal, M.
Santos, I. A.
Garcia, D.
Eiras, J. A.
Guo, R. Y.
Bhalla, A. S.
Abstract: It is still a challenging problem to obtain technologically useful materials displaying strong magnetoelectric coupling at room temperature. In the search for new effects and materials to achieve this kind of coupling, a nonlinear magnetoelectric effect was proposed in the magnetically disordered relaxor ferroelectric materials. In this context, the aluminum iron oxide (AlFeO3), a room temperature ferroelectric relaxor and magnetic spin glass compound, emerges as an attractive lead-free magnetoelectric material along with nonlinear magnetoelectric effects. In this work, static, dynamic, and temperature dependent ferroic and magnetoelectric properties in lead-free AlFeO3 and 2 at. Nb-doped AlFeO3 multiferroic magnetoelectric compositions are studied. Pyroelectric and magnetic measurements show changes in ferroelectric and magnetic states close to each other (∼200 K). The magnetoelectric coefficient behavior as a function of Hbias suggests a room temperature nonlinear magnetoelectric coupling in both single-phase and Nb-doped AlFeO3-based ceramic compositions.
It is still a challenging problem to obtain technologically useful materials displaying strong magnetoelectric coupling at room temperature. In the search for new effects and materials to achieve this kind of coupling, a nonlinear magnetoelectric effect was proposed in the magnetically disordered relaxor ferroelectric materials. In this context, the aluminum iron oxide ( AlFeO3), a room temperature ferroelectric relaxor and magnetic spin glass compound, emerges as an attractive lead-free magnetoelectric material along with nonlinear magnetoelectric effects. In this work, static, dynamic, and temperature dependent ferroic and magnetoelectric properties in lead-free AlFeO3 and 2 at.% Nb-doped AlFeO3 multiferroic magnetoelectric compositions are studied. Pyroelectric and magnetic measurements show changes in ferroelectric and magnetic states close to each other ( similar to 200 K). The magnetoelectric coefficient behavior as a function of Hbias suggests a room temperature nonlinear magnetoelectric coupling in both single-phase and Nb-doped AlFeO3-based ceramic compositions.
Subject: Anisotropia magnética, Ferroeletricidade, Óxidos de ferro
Country: Estados Unidos
Editor: AIP Publishing
Citation: Journal Of Applied Physics. American Institute Of Physics Inc., v. 117, n. 6, p. - , 2015.
Rights: aberto
Identifier DOI: 10.1063/1.4908016
Address: https://aip.scitation.org/doi/10.1063/1.4908016
Date Issue: 2015
Appears in Collections:IFGW - Artigos e Outros Documentos

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