Dynamic magnetization on the low temperature magnetoelectric effect in multiferroic composites

Author(s)

Gualdi, Alexandre Jose ^[1] ; Zabotto, Fabio Luis ^[1] ; Garcia, Ducinei ^[1] ; Bhalla, Amar S. ^[2] ; Guo, Ruyan ^[2] ; de Camargo, Paulo Cesar ^[1] ; Aparecido de Oliveira, Adilson Jesus ^[1]

Affiliation

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

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

• Document type: Journal article
• Source: JOURNAL OF PHYSICS-CONDENSED MATTER; v. 30, n. 32 AUG 15 2018.
• Web of Science Citations: 1

Abstract

The dependence of frequency and applied magnetic field in the magnetoelectric effect (ME) of the composites 0.68Pb(Mg1/3Nb2/3)-0.32PbTiO(3)/CoFe2O4 (PMN-PT/CFO) and 0.68Pb(Mg1/3Nb2/3)-0.32PbTiO(3)/NiFe2O4 (PMN-PT/NFO) are investigated. The results for PMN-PT/CFO composite, show a hysteretic behavior for the ME coefficient, at low temperatures (5 K), for frequencies higher than 1000 Hz. Contrasting with these results, the ME coefficient for the PMN-PT/NFO shows a well-known peak-peak related with the magnetostriction coefficient. Based on energy levels of stabilization for each ferromagnetic phase, it was possible to explain the ME hysteretic distinct behavior of PMN-PT/CFO, because of the degeneracy in the energy levels, due to the spin-orbit coupling causing changes in the dynamic properties of the magnetoelastic interactions. (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: 17/24995-2 - Magnetism in multifunctional materials
• Grantee: Adilson Jesus Aparecido de Oliveira
• Support Opportunities: Regular Research Grants