Magnetoelectric coupling at the EuO/BaTiO₃ interface

Authors

Shi Cao, University of Nebraska-LincolnFollow
P Liu, University of Wyoming
Jinke Tang, University of WyomingFollow
Haidong Lu, University of Nebraska-LincolnFollow
C W. Bark, University of Wisconsin-Madison
Sangjin Ryu, University of Wisconsin-MadisonFollow
Chang-Beom Eom, University of Wisconsin-MadisonFollow
Alexei GruvermanFollow
Peter A. Dowben, University of Nebraska-LincolnFollow

Date of this Version

2013

Citation

APPLIED PHYSICS LETTERS 102 (2013)

Comments

Copyright 2013. Used by permission

Abstract

Magnetization modulation by ferroelectric polarization switching is reported for the ferromagnetic-ferroelectric EuO/BaTiO₃heterostructure. The value of the magnetization critical exponent β is consistent with the expected Heisenberg-like ferromagnetism of EuO and reported Curie temperature. The critical exponent is seen to decrease with increased magnetic coupling. The results are discussed in the context of data obtained earlier for epitaxial La_0.67Sr_0.33MnO₃/BaTiO₃ heterostructures, where magnetization increases and critical exponent b also declines with ferroelectric polarization pointing away from ferromagnetic layer. The observed similarity between two systems illustrates an importance of charge doping in magnetoelectric coupling, which can be modulated by ferroelectric polarization reversal.