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

Author(s)

Gualdi, A. J. ^[1] ; Zabotto, F. L. ^[1] ; Garcia, D. ^[1] ; Bhalla, A. ^[2] ; Guo, R. ^[2] ; de Camargo, P. C. ^[1] ; de Oliveira, A. J. A. ^[1]

Affiliation

^[1] Univ Fed Sao Carlos, Dept Phys, BR-13560 Sao Carlos, SP - Brazil

^[2] Univ Texas San Antonio, Dept Elect & Comp Engn, San Antonio, TX 78249 - USA

• Document type: Journal article
• Source: Journal of Applied Physics; v. 119, n. 12 MAR 28 2016.
• Web of Science Citations: 2

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. (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
• FAPESP's process: 10/07518-7 - Size effect on magnetoelectric coupling of nanostructured multiferroic composite materials
• Grantee: Fabio Luis Zabotto
• Support Opportunities: Scholarships in Brazil - Post-Doctoral