Magnetic phase transition and magnetocaloric effect in Mn1-xZnxCoGe alloys

doi:10.1088/1674-1056/23/9/097502

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 Mn_1-xZn_xCoGe alloys

沈程娟, 刘强, 龚元元, 王敦辉, 都有为

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 Mn_1-xZn_xCoGe 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)

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/Abstract

摘要： The magnetic phase transition and magnetocaloric effect are studied in a series of Mn_1-xZn_xCoGe (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 Mn_1-xZn_xCoGe (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)

沈程娟, 刘强, 龚元元, 王敦辉, 都有为. Magnetic phase transition and magnetocaloric effect in Mn_1-xZn_xCoGe alloys[J]. 中国物理B, 2014, 23(9): 97502-097502.

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). Magnetic phase transition and magnetocaloric effect in Mn_1-xZn_xCoGe alloys[J]. Chin. Phys. B, 2014, 23(9): 97502-097502.

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Magnetic phase transition and magnetocaloric effect in Mn_1-xZn_xCoGe alloys

Magnetic phase transition and magnetocaloric effect in Mn_1-xZn_xCoGe alloys

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