Voltage-Controlled Sensitivity of the Spin Seebeck Effect in Pt/ Y3Fe5 O12/Mg O/ (PbMg1/3Nb2/3 O3)0.7 (PbTi O3)0.3 Multiferroic Heterostructures

Abstract

The characteristics of pure spin current from the longitudinal spin Seebeck effect are investigated at room temperature in Pt/Y3Fe5O12 deposited on the (PbMg1/3Nb2/3O3)0.7(PbTiO3)0.3 substrate, through which electrostrain can be controllably applied. The applied voltage enables the modification of magnetic anisotropy in the magnetic insulating Y3Fe5O12 layer, and thus the sensitivity of the spin Seebeck effect at small magnetic fields, without suppressing the spin Seebeck effect and the inverse spin Hall effect. This is due to the robust intrinsic physical parameters in Pt/Y3Fe5O12. Our results pave the way for the application of voltage-controlled pure spin-current devices.