Understanding the dynamic magnetization process for the magnetoelectric effect in multiferroic composites

Abstract:  Based on a magnetic relaxation model, an approach that includes the spin dynamics is proposed and applied to describe the magnetoelectric (ME) effect frequency dependence for a 0-3 type composite at low temperatures. Our results show that the ME coefficient, in low temperatures, for PMN-PT/CFO ((1 – x)Pb(Mg1/3Nb2/3) – xPbTiO(3)/CoFe2O4) composite has a step-like behavior on the hysteresis loop for frequency of 1 kHz, contrasting with the results at low frequencies (10 Hz). This approach assumes that the ferromagnetic and ferroelectric phases are coupled through the interactions of the spins of the ferromagnetic phase with the composite phonons by spin/lattice relaxation. (C) 2016 AIP Publishing LLC.

Author(s): Gualdi, AJ; Zabotto, FL; Garcia, D; Bhalla, A; Guo, R; de Camargo, PC; de Oliveira, AJA

JOURNAL OF APPLIED PHYSICS

DOI: 10.1063/1.4944889