应变介导的Co90Fe10/BiFeO3/SrRuO3/PMN-PT异质结构中交换偏置的电场控制

Strain-mediated electric-field control of exchange bias in a Co90Fe10/BiFeO3/SrRuO3/PMN-PT heterostructure.

作者信息

Wu S Z, Miao J, Xu X G, Yan W, Reeve R, Zhang X H, Jiang Y

机构信息

State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.

1] State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China [2] Institut für Physik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany.

出版信息

Sci Rep. 2015 Mar 10;5:8905. doi: 10.1038/srep08905.

DOI:10.1038/srep08905

PMID:25752272

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4354138/

Abstract

The electric-field (E-field) controlled exchange bias (EB) in a Co90Fe10/BiFeO3 (BFO)/SrRuO3/PMN-PT heterostructure has been investigated under different tensile strain states. The in-plane tensile strain of the BFO film is changed from +0.52% to +0.43% as a result of external E-field applied to the PMN-PT substrate. An obvious change of EB by the control of non-volatile strain has been observed. A magnetization reversal driven by E-field has been observed in the absence of magnetic field. Our results indicate that a reversible non-volatile E-field control of a ferromagnetic layer through strain modulated multiferroic BFO could be achieved at room temperature.

摘要

在不同拉伸应变状态下，对Co90Fe10/BiFeO3（BFO）/SrRuO3/PMN-PT异质结构中的电场（E场）控制交换偏置（EB）进行了研究。由于向PMN-PT衬底施加外部E场，BFO薄膜的面内拉伸应变从+0.52%变为+0.43%。观察到通过控制非挥发性应变使EB发生了明显变化。在没有磁场的情况下，观察到由E场驱动的磁化反转。我们的结果表明，在室温下可以通过应变调制多铁性BFO实现对铁磁层的可逆非挥发性E场控制。