Electric modulation of magnetization at the BaTiO 3/La 0.67Sr 0.33MnO 3 interfaces

Abstract

We report large (>10) magnetization modulation by ferroelectric polarization reversal in the ferroelectric-ferromagnetic BaTiO 3/La 0.67Sr 0.33MnO 3 (BTO/LSMO) heterostructures. We find that the electrically induced change in magnetization is limited to the BTO/LSMO interface but extends about 3 nm deep into the LSMO layer-far beyond the expected screening length of metallic LSMO. It is suggested that this effect is due to a metal-insulator transition occurring at the BTO/LSMO interface as a result of electrostatic doping. © 2012 American Institute of Physics.