复杂铁磁氧化物异质结构中的逆自旋霍尔效应。

Inverse spin Hall effect in a complex ferromagnetic oxide heterostructure.

作者信息

Wahler Martin, Homonnay Nico, Richter Tim, Müller Alexander, Eisenschmidt Christian, Fuhrmann Bodo, Schmidt Georg

机构信息

Institut für Physik, Martin-Luther University Halle-Wittenberg, Halle, 06120, Germany.

Interdisziplinäres Zentrum für Materialwissenschaften, Martin-Luther University Halle-Wittenberg, Nanotechnikum Weinberg, Halle, 06120, Germany.

出版信息

Sci Rep. 2016 Jun 27;6:28727. doi: 10.1038/srep28727.

DOI:10.1038/srep28727

PMID:27346793

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4921828/

Abstract

We present spin pumping and inverse spin Hall effect (ISHE) in an epitaxial complex oxide heterostructure. Ferromagnetic La0.7Sr0.3MnO3 (LSMO) is used as a source of spin pumping while the spin sink exhibiting the ISHE consists of SrRuO3 (SRO). SRO is a ferromagnetic oxide with metallic conductivity, however, with a Curie temperature (TC) of 155 K, thus well below room temperature. This choice allows to perform the experiment above and below TC of the SRO and to demonstrate that SRO not only shows an ISHE of a magnitude comparable to Pt (though with opposite sign) in its non magnetic state but also exhibits a finite ISHE even 50 K below TC.

摘要

我们展示了外延复合氧化物异质结构中的自旋泵浦和逆自旋霍尔效应（ISHE）。铁磁体La0.7Sr0.3MnO3（LSMO）用作自旋泵浦源，而表现出ISHE的自旋汇由SrRuO3（SRO）组成。SRO是一种具有金属导电性的铁磁氧化物，但其居里温度（TC）为155 K，远低于室温。这种选择使得能够在SRO的居里温度以上和以下进行实验，并证明SRO不仅在其非磁性状态下表现出与Pt相当的ISHE（尽管符号相反），而且在比居里温度低50 K时仍表现出有限的ISHE。