中国物理B ›› 2014, Vol. 23 ›› Issue (9): 97502-097502.doi: 10.1088/1674-1056/23/9/097502

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Magnetic phase transition and magnetocaloric effect in Mn1-xZnxCoGe alloys

沈程娟, 刘强, 龚元元, 王敦辉, 都有为   

  1. National Laboratory of Solid State Microstructures and Jiangsu Key Laboratory for Nanotechnology, Nanjing University, Nanjing 210093, China
  • 收稿日期:2014-04-02 修回日期:2014-05-09 出版日期:2014-09-15 发布日期:2014-09-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 51371095).

Magnetic phase transition and magnetocaloric effect in Mn1-xZnxCoGe alloys

Shen Cheng-Juan (沈程娟), Liu Qiang (刘强), Gong Yuan-Yuan (龚元元), Wang Dun-Hui (王敦辉), Du You-Wei (都有为)   

  1. National Laboratory of Solid State Microstructures and Jiangsu Key Laboratory for Nanotechnology, Nanjing University, Nanjing 210093, China
  • Received:2014-04-02 Revised:2014-05-09 Online:2014-09-15 Published:2014-09-15
  • Contact: Wang Dun-Hui E-mail:wangdh@nju.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 51371095).

摘要: The magnetic phase transition and magnetocaloric effect are studied in a series of Mn1-xZnxCoGe (x=0.01, 0.02, 0.04, and 0.08) alloys. By introducing a small quantity of Zn element, the structural transformation temperature of the MnCoGe alloy is greatly reduced and a first-order magnetostructural transition is observed. Further increasing the Zn concentration results in a second-order ferromagnetic transition. Large room-temperature magnetocaloric effects with small magnetic hysteresis are obtained in alloys with x=0.01 and 0.02, which suggests their potential application in magnetic refrigeration.

关键词: magnetocaloric effect, magnetostructural transition

Abstract: The magnetic phase transition and magnetocaloric effect are studied in a series of Mn1-xZnxCoGe (x=0.01, 0.02, 0.04, and 0.08) alloys. By introducing a small quantity of Zn element, the structural transformation temperature of the MnCoGe alloy is greatly reduced and a first-order magnetostructural transition is observed. Further increasing the Zn concentration results in a second-order ferromagnetic transition. Large room-temperature magnetocaloric effects with small magnetic hysteresis are obtained in alloys with x=0.01 and 0.02, which suggests their potential application in magnetic refrigeration.

Key words: magnetocaloric effect, magnetostructural transition

中图分类号:  (Magnetocaloric effect, magnetic cooling)

  • 75.30.Sg
81.30.Kf (Martensitic transformations)