中国物理B ›› 2014, Vol. 23 ›› Issue (4): 48107-048107.doi: 10.1088/1674-1056/23/4/048107

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

Relation between martensitic transformation temperature range and lattice distortion ratio of NiMnGaCoCu Heusler alloys

韦俊a b, 谢忍a, 陈乐易a, 唐研梅a, 许连强a, 唐少龙a, 都有为a   

  1. a National Laboratory of Solid State Microstructures, Key Laboratory of Nanomaterials for Jiangsu Provincial and Department of Physics,Nanjing University, Nanjing 210093, China;
    b Department of Physics and Electronic Science, Guizhou Normal University, Guiyang 550001, China
  • 收稿日期:2013-09-03 修回日期:2013-10-14 出版日期:2014-04-15 发布日期:2014-04-15
  • 基金资助:
    Project supported by the National KeyProject of Fundamental Research of China (Grant No. 2012CB932304) and the National Natural Science Foundation of China (Grant No. U1232210).

Relation between martensitic transformation temperature range and lattice distortion ratio of NiMnGaCoCu Heusler alloys

Wei Jun (韦俊)a b, Xie Ren (谢忍)a, Chen Le-Yi (陈乐易)a, Tang Yan-Mei (唐研梅)a, Xu Lian-Qiang (许连强)a, Tang Shao-Long (唐少龙)a, Du You-Wei (都有为)a   

  1. a National Laboratory of Solid State Microstructures, Key Laboratory of Nanomaterials for Jiangsu Provincial and Department of Physics,Nanjing University, Nanjing 210093, China;
    b Department of Physics and Electronic Science, Guizhou Normal University, Guiyang 550001, China
  • Received:2013-09-03 Revised:2013-10-14 Online:2014-04-15 Published:2014-04-15
  • Contact: Tang Shao-Long E-mail:tangsl@nju.edu.cn
  • About author:81.30.Kf; 61.66.Dk; 75.50.Cc
  • Supported by:
    Project supported by the National KeyProject of Fundamental Research of China (Grant No. 2012CB932304) and the National Natural Science Foundation of China (Grant No. U1232210).

摘要: In order to study the relation between martensitic transformation temperature range ΔT (where ΔT is the difference between martensitic transformation start and finish temperature) and lattice distortion ratio (c/a) of martensitic transformation, a series of Ni46Mn28-xGa22Co4Cux (x= 2-5) Heusler alloys is prepared by arc melting method. The vibration sample magnetometer (VSM) experiment results show that ΔT increases when x> 4 and decreases when x< 4 with x increasing, and the minimal ΔT (about 1 K) is found at x=4. Ambient X-ray diffraction (XRD) results show that ΔT is proportional to c/a for non-modulated Ni46Mn28-xGa22Co4Cux (x= 2-5) martensites. The relation between ΔT and c/a is in agreement with the analysis result obtained from crystal lattice mismatch model. About 1000-ppm strain is found for the sample at x=4 when heating temperature increases from 323 K to 324 K. These properties, which allow a modulation of ΔT and temperature-induced strain during martensitic transformation, suggest Ni46Mn24Ga22Co4Cu4 can be a promising actuator and sensor.

关键词: martensitic transformation temperature range, lattice distortion ratio, martensitic transformation

Abstract: In order to study the relation between martensitic transformation temperature range ΔT (where ΔT is the difference between martensitic transformation start and finish temperature) and lattice distortion ratio (c/a) of martensitic transformation, a series of Ni46Mn28-xGa22Co4Cux (x= 2-5) Heusler alloys is prepared by arc melting method. The vibration sample magnetometer (VSM) experiment results show that ΔT increases when x> 4 and decreases when x< 4 with x increasing, and the minimal ΔT (about 1 K) is found at x=4. Ambient X-ray diffraction (XRD) results show that ΔT is proportional to c/a for non-modulated Ni46Mn28-xGa22Co4Cux (x= 2-5) martensites. The relation between ΔT and c/a is in agreement with the analysis result obtained from crystal lattice mismatch model. About 1000-ppm strain is found for the sample at x=4 when heating temperature increases from 323 K to 324 K. These properties, which allow a modulation of ΔT and temperature-induced strain during martensitic transformation, suggest Ni46Mn24Ga22Co4Cu4 can be a promising actuator and sensor.

Key words: martensitic transformation temperature range, lattice distortion ratio, martensitic transformation

中图分类号:  (Martensitic transformations)

  • 81.30.Kf
61.66.Dk (Alloys ) 75.50.Cc (Other ferromagnetic metals and alloys)