全氧化物CoFeO/LaSrMnO/Pb(MgNb)TiO异质结构的电场介导磁性能

Electric-field-mediated magnetic properties of all-oxide CoFeO/LaSrMnO/Pb(MgNb)TiO heterostructures.

作者信息

Wang Ping, Jin Chao, Li Dong, Wang Yuchen, Liu Shasha, Wang Xinyue, Pang Xin, Zheng Dongxing, Zheng Wanchao, Zheng Rongkun, Bai Haili

机构信息

Tianjin Key Laboratory of Low Dimensional Materials Physics and Processing Technology, School of Science, Tianjin University, Tianjin 300350, P. R. China.

出版信息

Phys Chem Chem Phys. 2020 Jun 14;22(22):12651-12657. doi: 10.1039/d0cp01374a. Epub 2020 May 27.

DOI:10.1039/d0cp01374a

PMID:32458900

Abstract

Electric-field-mediated magnetic properties were investigated in CoFeO/LaSrMnO/Pb(MgNb)TiO (CFO/LSMO/PMN-PT) heterostructures. The butterfly-like behavior of the magnetization under different electric fields indicates that the strain effect plays a critical role in the electric-field-mediated magnetic properties, leading to an increase in magnetization along the [100] direction but a decrease along the [01-1] direction in the CFO/LSMO/PMN-PT heterostructures. More interestingly, due to the large magnetostriction of the CFO layer, the coercivity of the CFO/LSMO/PMN-PT heterostructures decreases ∼50% along the [01-1] direction under the electric fields. The large modulation of the coercivity makes it possible to achieve electric-field-controlled magnetoresistance in the metal/CFO/LSMO/PMN-PT spin filter magnetic tunneling junctions.

摘要

在CoFeO/LaSrMnO/Pb(MgNb)TiO（CFO/LSMO/PMN-PT）异质结构中研究了电场介导的磁性能。不同电场下磁化强度的蝶形行为表明，应变效应在电场介导的磁性能中起关键作用，导致CFO/LSMO/PMN-PT异质结构中沿[100]方向的磁化强度增加，而沿[01-1]方向的磁化强度降低。更有趣的是，由于CFO层的大磁致伸缩，在电场作用下，CFO/LSMO/PMN-PT异质结构沿[01-1]方向的矫顽力降低了约50%。矫顽力的大幅调制使得在金属/CFO/LSMO/PMN-PT自旋过滤磁隧道结中实现电场控制的磁电阻成为可能。