中国物理B ›› 2014, Vol. 23 ›› Issue (6): 68103-068103.doi: 10.1088/1674-1056/23/6/068103

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Evolution of magnetic domain structure of martensite in Ni-Mn-Ga films under the interplay of the temperature and magnetic field

谢忍a, 韦俊a, 刘仲武b, 唐妍梅a, 唐涛a, 唐少龙a, 都有为a   

  1. a National Laboratory of Microstructures, Jiangsu Provincial Laboratory for Nanotechnology and Department of Physics, Nanjing University, Nanjing 210093, China;
    b School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
  • 收稿日期:2013-10-18 修回日期:2013-02-18 出版日期:2014-06-15 发布日期:2014-06-15
  • 基金资助:
    Project supported by the National Key Project of Fundamental Research of China (Grant No. 2012CB932304), the National Natural Science Foundation of China (Grant No. 50831006), and the Program for New Century Excellent Talents in University (Grant No. NCET-11-0156), and the Priority Academic Program Development of Jiangsu Higher Education Institutions.

Evolution of magnetic domain structure of martensite in Ni-Mn-Ga films under the interplay of the temperature and magnetic field

Xie Ren (谢忍)a, Wei Jun (韦俊)a, Liu Zhong-Wu (刘仲武)b, Tang Yan-Mei (唐妍梅)a, Tang Tao (唐涛)a, Tang Shao-Long (唐少龙)a, Du You-Wei (都有为)a   

  1. a National Laboratory of Microstructures, Jiangsu Provincial Laboratory for Nanotechnology and Department of Physics, Nanjing University, Nanjing 210093, China;
    b School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
  • Received:2013-10-18 Revised:2013-02-18 Online:2014-06-15 Published:2014-06-15
  • Contact: Tang Shao-Long E-mail:tangsl@nju.edu.cn
  • Supported by:
    Project supported by the National Key Project of Fundamental Research of China (Grant No. 2012CB932304), the National Natural Science Foundation of China (Grant No. 50831006), and the Program for New Century Excellent Talents in University (Grant No. NCET-11-0156), and the Priority Academic Program Development of Jiangsu Higher Education Institutions.

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摘要： Ferromagnetic shape memory Ni-Mn-Ga films with 7M modulated structure were prepared on MgO (001) substrates by magnetron sputtering. Magnetization process with a typical two-hysteresis loop indicates the occurrence of the reversible magnetic field-induced reorientation. Magnetic domain structure and twin structure of the film were controlled by the interplay of the magnetic and temperature field. With cooling under an out-of-plane magnetic field, the evolution of magnetic domain structure reveals that martensitic transformation could be divided into two periods: nucleation and growth. With an in-plane magnetic field applied to a thermomagnetic-treated film, the evolution of magnetic domain structure gives evidence of a reorientation of twin variants of martensite. A microstructural model is described to define the twin structure and to produce the magnetic domain structure at the beginning of martensitic transformation; based on this model, the relationship between the twin structure and the magnetic domain structure for the treated film under an in-plane field is also described.

关键词: Ni-Mn-Ga film, martensitic transformation, magnetically induced reorientation, magnetic domain structure

Abstract: Ferromagnetic shape memory Ni-Mn-Ga films with 7M modulated structure were prepared on MgO (001) substrates by magnetron sputtering. Magnetization process with a typical two-hysteresis loop indicates the occurrence of the reversible magnetic field-induced reorientation. Magnetic domain structure and twin structure of the film were controlled by the interplay of the magnetic and temperature field. With cooling under an out-of-plane magnetic field, the evolution of magnetic domain structure reveals that martensitic transformation could be divided into two periods: nucleation and growth. With an in-plane magnetic field applied to a thermomagnetic-treated film, the evolution of magnetic domain structure gives evidence of a reorientation of twin variants of martensite. A microstructural model is described to define the twin structure and to produce the magnetic domain structure at the beginning of martensitic transformation; based on this model, the relationship between the twin structure and the magnetic domain structure for the treated film under an in-plane field is also described.

Key words: Ni-Mn-Ga film, martensitic transformation, magnetically induced reorientation, magnetic domain structure

中图分类号:  (Treatment of materials and its effects on microstructure, nanostructure, And properties)

  • 81.40.-z
75.70.Kw (Domain structure (including magnetic bubbles and vortices)) 75.70.-i (Magnetic properties of thin films, surfaces, and interfaces) 75.80.+q (Magnetomechanical effects, magnetostriction)