Dynamic magnetization on the low temperature magnetoelectric effect in multiferroic composites

Alexandre José Gualdi; Fabio Luis Zabotto; Ducinei Garcia; Amar S Bhalla; Ruyan Guo; Paulo Cesar de Camargo; Adilson Jesus Aparecido de Oliveira

doi:10.1088/1361-648X/aad151

Dynamic magnetization on the low temperature magnetoelectric effect in multiferroic composites

J Phys Condens Matter. 2018 Aug 15;30(32):325803. doi: 10.1088/1361-648X/aad151. Epub 2018 Jul 5.

Authors

Alexandre José Gualdi¹, Fabio Luis Zabotto, Ducinei Garcia, Amar S Bhalla, Ruyan Guo, Paulo Cesar de Camargo, Adilson Jesus Aparecido de Oliveira

Affiliation

¹ Physics Department at Federal University of São Carlos, São Carlos, Brazil.

PMID: 29975194
DOI: 10.1088/1361-648X/aad151

Abstract

The dependence of frequency and applied magnetic field in the magnetoelectric effect (ME) of the composites 0.68Pb(Mg_1/3Nb_2/3)-0.32PbTiO₃/CoFe₂O₄ (PMN-PT/CFO) and 0.68Pb(Mg_1/3Nb_2/3)-0.32PbTiO₃/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.