Symmetry Control of Unconventional Spin–Orbit Torques in IrO2

Author:

Patton Michael1,Gurung Gautam2,Shao Ding‐Fu2,Noh Gahee3,Mittelstaedt Joseph A.4,Mazur Marcel4,Kim Jong‐Woo5,Ryan Philip J.56,Tsymbal Evgeny Y.2,Choi Si‐Young378,Ralph Daniel C.49,Rzchowski Mark S.10,Nan Tianxiang11,Eom Chang‐Beom1ORCID

Affiliation:

1. Department of Materials Science and Engineering University of Wisconsin‐Madison Madison WI 53706 USA

2. Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience University of Nebraska Lincoln NE 68588 USA

3. Department of Materials Science and Engineering Pohang University of Science and Technology Pohang Gyeongbuk 37673 Republic of Korea

4. Cornell University Ithaca NY 14853 USA

5. X‐Ray Science Division Argonne National Laboratory Argonne IL 60439 USA

6. School of Physical Sciences Dublin City University Dublin 9 Ireland

7. Center for Van der Waals Quantum Solids Institute for Basic Science (IBS) Pohang 37673 Republic of Korea

8. Semiconductor Engineering Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea

9. Kavli Institute at Cornell for Nanoscale Science Ithaca NY 14853 USA

10. Department of Physics University of Wisconsin‐Madison Madison WI 53706 USA

11. School of Integrated Circuits and Beijing National Research Center for Information Science and Technology (BNRist) Tsinghua University Beijing 100084 China

Abstract

AbstractSpin–orbit torques generated by a spin current are key to magnetic switching in spintronic applications. The polarization of the spin current dictates the direction of switching required for energy‐efficient devices. Conventionally, the polarizations of these spin currents are restricted to be along a certain direction due to the symmetry of the material allowing only for efficient in‐plane magnetic switching. Unconventional spin–orbit torques arising from novel spin current polarizations, however, have the potential to switch other magnetization orientations such as perpendicular magnetic anisotropy, which is desired for higher density spintronic‐based memory devices. Here, it is demonstrated that low crystalline symmetry is not required for unconventional spin–orbit torques and can be generated in a nonmagnetic high symmetry material, iridium dioxide (IrO2), using epitaxial design. It is shown that by reducing the relative crystalline symmetry with respect to the growth direction large unconventional spin currents can be generated and hence spin–orbit torques. Furthermore, the spin polarizations detected in (001), (110), and (111) oriented IrO2 thin films are compared to show which crystal symmetries restrict unconventional spin transport. Understanding and tuning unconventional spin transport generation in high symmetry materials can provide a new route towards energy‐efficient magnetic switching in spintronic devices.

Funder

U.S. Department of Energy

Office of Science

Basic Energy Sciences

National Science Foundation

Pohang University of Science and Technology

National Research Foundation of Korea

Publisher

Wiley

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

Cited by 5 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3