Magnetoelectric Contribution to Magnetoelastic Coupling in Pb(Fe_1/2Nb_1/2)O₃ Multiferroics Ceramics

B. Fraygola Universidade Federal de São Carlos, Dpto de Física, Grupo de Cerâmicas Ferroelétricas (GCFerr), CEP 13565-670, São Carlos, SP, Brasil

N. Frizon Universidade Federal de São Carlos, Dpto de Física, Grupo de Cerâmicas Ferroelétricas (GCFerr), CEP 13565-670, São Carlos, SP, Brasil

M. H. Lente Universidade Federal de São Paulo, Campus São José dos Campos, Departamento de Ciência e Tecnologia, CEP 12231-280, São Jose dos Campos, SP, Brasil

Adelino A. Coelho Universidade de Campinas, LPCM, DFA, IFGW

D. Garcia Universidade Federal de São Carlos, Dpto de Física, Grupo de Cerâmicas Ferroelétricas (GCFerr), CEP 13565-670, São Carlos, SP, Brasil

J. A. Eiras Universidade Federal de São Carlos, Dpto de Física, Grupo de Cerâmicas Ferroelétricas (GCFerr), CEP 13565-670, São Carlos, SP, Brasil

Abstract

In this work, electrical permittivity, magnetic and anelastic measurements in lead iron niobate ceramics (PFN) were performed in the frequency and temperature range from 1 kHz to 10 MHz and from 15 K to 400 K, respectively. Anelastic results characterized unambiguously the magnetoelectric effect in the PFN, demonstrating that ME coupling arises indirectly via strain contribution rather than a direct coupling between electrical and magnetic order parameters.

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Acknowledgments

The authors wish to thank FAPESP for the financial support (proc. 2007/08029-7) and to Mr. Francisco J. Picon and Mrs. Natalia A. Zanardi for the technical assistance.

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Magnetoelectric Contribution to Magnetoelastic Coupling in Pb(Fe_1/2Nb_1/2)O₃ Multiferroics Ceramics

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Magnetoelectric Contribution to Magnetoelastic Coupling in Pb(Fe_1/2Nb_1/2)O₃ Multiferroics Ceramics