中国物理B ›› 2011, Vol. 20 ›› Issue (9): 97501-097501.doi: 10.1088/1674-1056/20/9/097501

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Magnetic phase transitions and magnetocaloric effect in the Fe-doped MnNiGe alloys

王敦辉2, 张成亮3, 陈健3, 王廷志3, 谢广喜3, 朱纯3   

  • 收稿日期:2011-03-23 修回日期:2011-04-23 出版日期:2011-09-15 发布日期:2011-09-15

Magnetic phase transitions and magnetocaloric effect in the Fe-doped MnNiGe alloys

Zhang Cheng-Liang(张成亮)a), Wang Dun-Hui(王敦辉)b), Chen Jian(陈健)a),Wang Ting-Zhi(王廷志)a), Xie Guang-Xi(谢广喜)a), and Zhu Chun(朱纯)a)   

  1. a School of Science, Jiangnan University, Wuxi 214122, China; b National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China
  • Received:2011-03-23 Revised:2011-04-23 Online:2011-09-15 Published:2011-09-15

摘要: The magnetic phase transition and magnetocaloric effects in Fe-doped MnNiGe alloys are investigated. The substitution of Fe for Ni decreases the structural transition temperature remarkably, resulting in the magnetostructural transition occurring between antiferromagnetic and ferromagnetic states in MnNi1 - xFexGe alloy. Owing to the enhanced ferromagnetic coupling induced by the substitution of Fe, metamagnetic behaviour is also observed in TiNiSi-type phase of MnNi1 - xFexGe alloys at temperature below the structural transition temperature.

关键词: magnetostructural transition, metamagnetic, magnetocaloric effect

Abstract: The magnetic phase transition and magnetocaloric effects in Fe-doped MnNiGe alloys are investigated. The substitution of Fe for Ni decreases the structural transition temperature remarkably, resulting in the magnetostructural transition occurring between antiferromagnetic and ferromagnetic states in MnNi1 - xFexGe alloy. Owing to the enhanced ferromagnetic coupling induced by the substitution of Fe, metamagnetic behaviour is also observed in TiNiSi-type phase of MnNi1 - xFexGe alloys at temperature below the structural transition temperature.

Key words: magnetostructural transition, metamagnetic, magnetocaloric effect

中图分类号:  (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))

  • 75.30.Kz
75.30.Sg (Magnetocaloric effect, magnetic cooling) 75.50.Ee (Antiferromagnetics) 75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects)