journal article·2021-04

Field‐Free Manipulation of Skyrmion Creation and Annihilation by Tunable Strain Engineering

Chun Feng, Fei Meng, Yadong Wang, Jiawei Jiang, Nasir Mehmood, Yi Cao, Xiaowei Lv, Feng Yang, Lei Wang, Yongkang Zhao, Shuai Xie, Zhipeng Hou, Wenbo Mi, Yong Peng, Kaiyou Wang, Xingsen Gao, Guanghua Yu, Junming Liu

Advanced Functional Materials· Volume 31· Issue 14
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Abstract

Abstract Creation and annihilation of skyrmions are two crucial issues for constructing skyrmion‐based memory and logic devices. To date, these operations were mainly achieved by means of external magnetic, electrical, and optical modulations. In this work, we demonstrated an effective strain‐induced skyrmion nucleation/annihilation phenomenon in [Pt/Co/Ta]n multilayers utilizing the shape memory effect of a TiNiNb substrate. A tunable tensile strain up to 1.0% can be realized in the films by thermally driving phase transition of the substrate, which significantly decreases the nucleation field of skyrmions by as many as 400 Oe and facilitates the field‐free manipulation of skyrmions with the strain. Such a strain effect can be attributed to the synergetic interplay of the planar magnetic moment twirling and decrement of interfacial Dzyaloshinskii–Moriya interaction. In addition, the strain tunability is found to be strongly related to the strain direction due to magnetoelastic interaction. These findings provide a novel strategy for developing strain‐assisted skyrmion‐based memory and logic devices.
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Research context

OpenAlex topics: Shape Memory Alloy Transformations · Magnetic properties of thin films · Magnetic and transport properties of perovskites and related materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 P. R. China

Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute for Advanced Materials South China Academy of Advanced Optoelectronics South China Normal University Guangzhou 510006 P. R. China

National Center for International Research on Green Optoelectronics South China Normal University Guangzhou 510006 P. R. China

Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparation Technology School of Science Tianjin University Tianjin 300354 P. R. China

State Key Laboratory of Superlattices and Microstructures Institute of Semiconductors Chinese Academy of Sciences Beijing 100083 P. R. China

Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education Lanzhou University Lanzhou 730000 P. R. China

State Key Laboratory of Heavy Oil Processing China University of Petroleum‐Beijing Beijing 102249 P. R. China

Laboratory of Solid State Microstructures Nanjing University Nanjing 211102 P. R. China

Funding

National Basic Research Program of China · National Natural Science Foundation of China · Natural Science Foundation of Beijing Municipality · Fundamental Research Funds for the Central Universities

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