Stress magnetization model for magnetostriction in multiferroic composite

Author(s)

Gualdi, A. J. ^[1] ; Zabotto, F. L. ^[1] ; Garcia, D. ^[1] ; de Oliveira, A. J. A. ^[1]

Affiliation

^[1] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Paulo - Brazil

• Document type: Journal article
• Source: Journal of Applied Physics; v. 114, n. 5 AUG 7 2013.
• Web of Science Citations: 6

Abstract

An alternative to obtain multiferroic materials is the production of composite materials that combine ferroelectric and magnetic materials. In particular, the use of magnetostrictive materials as ferromagnetic phase in composites is very important because the mechanical stress applied in ferroelectric phase induces the appearance of magnetoelectric effect. In this work, we have proposed a generalized model for the magnetostriction dependence with the magnetization of the 0-3 type composite magnetoelectric materials. Including both piezomagnetic and stress dependence in the magnetostriction, a relevant improvement was reached as compared to the ordinary square magnetization model. Based on the Gibbs free energy expansion, the magnetostriction behavior of the composite (1 - x)Pb(Mg1/3Nb2/3) - xPbTiO(3)/CoFe2O4 at 300 K and 5 K is described. Furthermore, using the piezomagnetic correction, the magnetostriction data for the pure CoFe2O4 is fitted showing that this ferrite presents a relevant piezomagnetic effect. (C) 2013 AIP Publishing LLC. (AU)

• FAPESP's process: 10/00040-4 - Investigation of multiferroic composites through magnetization, magnetic susceptibility, magnetoeletric effect and magnetostriction measurements.
• Grantee: Alexandre José Gualdi
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 12/24025-0 - Magnetic, electrical and magnetostrictive properties of multiferroic composites and dilute magnetic semiconductors oxides
• Grantee: Adilson Jesus Aparecido de Oliveira
• Support Opportunities: Regular Research Grants