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

Bo Yang ¹Ivan Soldatov ²Fenghua Chen ³Yudong Zhang ⁴Zongbin Li ¹Haile Yan ¹Rudolf Sch?fer ⁵Dunhui Wang ⁶Claude Esling ⁴Xiang Zhao ¹Liang Zuo¹

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作者信息

1. Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education),School of Material Science and Engineering,Northeastern University,Shenyang 110819,China
2. Institute for Metallic Materials,Leibniz Institute for Solid State and Materials Research(IFW)Dresden,Helmholtzstrasse 20,01069 Dresden,Germany;Institute of Natural Sciences,Ural Federal University,620002 Ekaterinburg,Russia
3. Department of Physics,School of Applied Science,Taiyuan University of Science and Technology,Taiyuan 030024,China
4. Laboratoire d'Étude des Microstructures et de Mécanique des Matériaux(LEM3),CNRS UMR 7239,Université de Lorraine,57045 Metz,France
5. Institute for Metallic Materials,Leibniz Institute for Solid State and Materials Research(IFW)Dresden,Helmholtzstrasse 20,01069 Dresden,Germany;Institute for Materials Science,Dresden University of Technology,01062 Dresden,Germany
6. National Laboratory of Solid State Microstructures and Jiangsu Key Laboratory for Nanotechnology and Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China
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Abstract

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 inves-tigated 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 magnetiza-tion changes in the hysteresis loops should be attributed to the magnetic domain evolution instead of the MIR.

Key words

Ni-Mn-Ga thin films/Magnetic field-induced variant reorientation/Magnetic domains/Magnetization process/Magneto-optical Kerr microscopy

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基金项目

National Natural Science Foun-dation of China(Grantss52071071)

Liaoning Revitalization Talents Program(XLYC1802023)

Fundamental Research Funds for the Central Universities of China(sN2102006)

Program of Introducing Talents of Discipline Innovation to Universities(BP0719037)

出版年

2022

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI

影响因子：0.657

ISSN：1005-0302

参考文献量40

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