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Tailoring Magnetoelectric Coupling in BiFeO 3 /La 0.7 Sr 0.3 MnO 3 Heterostructure through the Interface Engineering
Author(s) -
Yi Di,
Yu Pu,
Chen YiChun,
Lee HsinHua,
He Qing,
Chu YingHao,
Ramesh Ramamoorthy
Publication year - 2019
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201806335
Subject(s) - materials science , heterojunction , spintronics , ferroelectricity , magnetization , magnetism , exchange bias , condensed matter physics , atomic units , coupling (piping) , electric field , optoelectronics , nanotechnology , ferromagnetism , dielectric , magnetic field , magnetic anisotropy , physics , quantum mechanics , metallurgy
Electric field control of magnetism ultimately opens up the possibility of reducing energy consumption of memory and logic devices. Electric control of magnetization and exchange bias are demonstrated in all‐oxide heterostructures of BiFeO 3 (BFO) and La 0.7 Sr 0.3 MnO 3 (LSMO). However, the role of the polar heterointerface on magnetoelectric (ME) coupling is not fully explored. Here, the ME coupling in BFO/LSMO heterostructures with two types of interfaces, achieved by exploiting the interface engineering at the atomic scale, is investigated. It is shown that both magnetization and exchange bias are reversibly controlled by switching the ferroelectric polarization of BFO. Intriguingly, distinctly different modulation behaviors that depend on the interfacial atomic sequence are observed. These results provide new insights into the underlying physics of ME coupling in the model system. This study highlights that designing interface at the atomic scale is of general importance for functional spintronic devices.