Engineering Co/MgO interface with heavy metals for voltage-controlled magnetic anisotropy effect

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2023-01-16 DOI:10.1063/5.0128587

H. Nakayama, T. Nozaki, T. Nozaki, S. Yuasa

引用次数: 5

Abstract

We have investigated the voltage-controlled magnetic anisotropy (VCMA) effect in Co/MgO junctions by inserting a sub-atomic layer of heavy metals at the interface. We evaluated an electrical control of the magnetic anisotropy by using a micro-magneto-optical Kerr effect magnetometer. The VCMA coefficient of the Co/MgO junctions increases with the insertion of an Ir or Pt layer and decreases with the insertion of an Os layer. These results imply that the VCMA coefficient can be engineered by doping heavy metals at the interface. The interface engineering using a heavy metal layer provides us with a method to control the VCMA coefficient over a wide range.

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用于压控磁各向异性效应的Co/MgO与重金属的工程界面

我们通过在Co/MgO结界面插入重金属亚原子层，研究了Co/MgO结的电压控制磁各向异性(VCMA)效应。我们利用微磁光克尔效应磁强计评估了磁各向异性的电控制。Co/MgO结的VCMA系数随Ir或Pt层的加入而增大，随Os层的加入而减小。这些结果表明，可以通过在界面处掺杂重金属来设计VCMA系数。使用重金属层的界面工程为我们在大范围内控制VCMA系数提供了一种方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.