Multi-interface spin exchange regulated biased magnetoelectric coupling in Cluster-assembled multiferroic heterostructural films

被引：16

作者：

Bai, Yulong ^{[1
]}

Yang, Bo ^{[1
]}

Zhang, Hao ^{[2
]}

Wu, Xin ^{[1
]}

Jiang, Ning ^{[1
]}

Zhao, Shifeng ^{[1
]}

机构：

[1] Inner Mongolia Univ, Sch Phys Sci & Technol, Inner Mongolia Key Lab Nanosci & Nanotechnol, Hohhot 010021, Peoples R China

[2] Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA

来源：

ACTA MATERIALIA | 2018年 / 155卷

基金：

中国国家自然科学基金;

关键词：

Multi-interface; Cluster; Interfacial spin exchange; Biased magnetoelectric coupling;

D O I：

10.1016/j.actamat.2018.05.069

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cluster-assembled Ni-NiO core-shell structures were periodically immersed into multiferroic BisTi(3)-FeO15 (BTFO) film matrices to form pseudo 1-3 BTFO/Ni-NiO/BTFO heterostructural films with multiferroic/antiferromagnetic/ferromagnetic (MF/AFM/FM) multi-interfaces. A biased magnetoelectric coupling effect was obtained at room temperature by a magnetic annealing process. The biased direction depends on the orientation of the annealing magnetic field, with magnetoelectric coefficient curves moving to left after positive annealing magnetic field, while moving to right with negative annealing magnetic field. This biased magnetoelectric effect originates from the multi-interface spin exchange coupling. The immersion of cluster-assembled Ni-NiO core-shells in the multiferroic matrices enhance the interfacial coupling effect due to the large surface-to-volume ratio. Thus, the interfacial spin exchange induced biased magnetoelectric effect is enhanced and reversible. The work provides an avenue on the weak magnetic field detection, spintronic devices and multistate switching memories. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：166 / 174

页数：9

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