Observation of magnetic domain evolution in constrained epitaxial Ni-Mn-Ga thin films on MgO(001) substrate

被引：5
|
作者：
Yang, Bo [1 ]
Soldatov, Ivan [2 ,3 ]
Chen, Fenghua [4 ]
Zhang, Yudong [5 ]
Li, Zongbin [1 ]
Yan, Haile [1 ]
Schaefer, Rudolf [2 ,6 ]
Wang, Dunhui [7 ,8 ,9 ]
Esling, Claude [5 ]
Zhao, Xiang [1 ]
Zuo, Liang [1 ]
机构：
[1] Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110819, Peoples R China
[2] Leibniz Inst Solid State & Mat Res IFW Dresden, Inst Metall Mat, Helmholtzstr 20, D-01069 Dresden, Germany
[3] Ural Fed Univ, Inst Nat Sci, Ekaterinburg 620002, Russia
[4] Taiyuan Univ Sci & Technol, Sch Appl Sci, Dept Phys, Taiyuan 030024, Peoples R China
[5] Univ Lorraine, Lab Etud Microstruct & Mecan Mat LEM3, CNRS UMR 7239, F-57045 Metz, France
[6] Tech Univ Dresden, Inst Mat Sci, D-01062 Dresden, Germany
[7] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[8] Nanjing Univ, Jiangsu Key Lab Nanotechnol, Nanjing 210093, Peoples R China
[9] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2022年 / 102卷
关键词：
Ni-Mn-Ga thin films; Magnetic field-induced variant reorientation; Magnetic domains; Magnetization process; Magneto-optical Kerr microscopy; FIELD-INDUCED STRAIN; ACTUATION;
D O I：
10.1016/j.jmst.2021.06.029
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Epitaxial Ni-Mn-Ga thin films have promising application potential in micro-electro-mechanical sensing and actuation systems. To date, large abrupt magnetization changes have been observed in some epitaxial Ni-Mn-Ga thin films, but their origin either from magnetically induced martensite variant reorientation (MIR) or magnetic domain evolution has been discussed controversially. In the present work, we investigated the evolutions of the magnetic domain and microstructure of a typical epitaxial Ni-Mn-Ga thin film through wide-field magneto-optical Kerr-microscopy. It is demonstrated that the abrupt magnetization changes in the hysteresis loops should be attributed to the magnetic domain evolution instead of the MIR. (c) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
引用
收藏
页码：56 / 65
页数：10
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