Manipulation of topological spin textures in centrosymmetric rare-earth magnets  

作　　者：Shulan Zuo Kaiming Qiao Ying Zhang Tongyun Zhao Chengbao Jiang Baogen Shen 

机构地区：[1]Key Laboratory of Aerospace Materials and Performance (Ministry of Education),School of Materials Science and Engineering,Beihang University,Beijing 100191,China [2]School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China [3]Beijing National Laboratory for Condensed Matter Physics Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [4]Ningbo Institute of Materials Technology & Engineering,Chinese Academy of Sciences,Ningbo 315201,China

出　　处：《Journal of Materials Science & Technology》2023年第25期254-260,共7页材料科学技术（英文版）

基　　金：supported by the Science Center of the Na-tional Science Foundation of China(Grant No.52088101);the Na-tional Natural Science Foundation of China(Grant Nos.52121001,52001019,52271195,52101210,and 52130103);the National Key and Development Program of China(Grant Nos.2021YFB3501600,2022YFB3505302);the Strategic Priority Research Program(B)of the Chinese Academy of Sciences(Grant Nos.XDB33030100,XDB33030200);Youth Innovation Promotion Association(No.CAS Y201903).

摘　　要：Topologically protected magnetic skyrmions are expected to be used in the next-generation spintronic devices.Realizing their nucleation and manipulation at room temperature is fundamental for future practical applications.Here,using in situ Lorentz transmission electron microscopy and micromagnetic simulation,we demonstrate that magnetic biskyrmions can spontaneously exist at room temperature in Nd_(1-x) Tb_(x)Co_(5)(x=0.3,0.5)alloys.The spontaneous biskyrmions are controllably obtained over a wide temperature range across room temperature by switching atomic chemical environment.Furthermore,the density of biskyrmions can be tuned by a small magnetic field.High-density biskyrmions are stimulated to form in the thinner region at room temperature by introducing an in-plane magnetic field component.These results provide valuable insights into the manipulation of topological states,which is of great significance to their practical applications.

关 键 词：Biskyrmions Spin-reorientation transition MANIPULATION Nd1–TbCo5 

分 类 号：TG146.22[一般工业技术—材料科学与工程]