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Type: Artigo de periódico
Title: Room Temperature Nonlinear Magnetoelectric Effect In Lead-free And Nb-doped Alfeo3 Compositions
Author: Cotica L.F.
Santos G.M.
Freitas V.F.
Coelho A.A.
Pal M.
Santos I.A.
Garcia D.
Eiras J.A.
Guo R.
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.
Editor: American Institute of Physics Inc.
Rights: aberto
Identifier DOI: 10.1063/1.4908016
Date Issue: 2015
Appears in Collections:Unicamp - Artigos e Outros Documentos

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