中国物理B ›› 1995, Vol. 4 ›› Issue (9): 705-711.doi: 10.1088/1004-423X/4/9/009

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

INVESTIGATION OF THE STRUCTURAL PHASE TRANSITION OF MnBi AND MnBiAl FILMS

杨会生, 张晓卫, 徐瑶, 朱文凯, 王荫君   

  1. State Key Laboratory of Magnetism, Institute of Physics, Academia Sinica, Beijing 100080, China
  • 收稿日期:1994-12-24 出版日期:1995-09-20 发布日期:1995-09-20
  • 基金资助:
    Project supported by the Chinese Academy of Sciences and in part by the National Natural Science Foundation of China.

INVESTIGATION OF THE STRUCTURAL PHASE TRANSITION OF MnBi AND MnBiAl FILMS

YANG HUI-SHENG (杨会生), ZHANG XIAO-WEI (张晓卫), XU YAO (徐瑶), ZHU WEN-KAI (朱文凯), WANG YIN-JUN (王荫君)   

  1. State Key Laboratory of Magnetism, Institute of Physics, Academia Sinica, Beijing 100080, China
  • Received:1994-12-24 Online:1995-09-20 Published:1995-09-20
  • Supported by:
    Project supported by the Chinese Academy of Sciences and in part by the National Natural Science Foundation of China.

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摘要： Structural phase transition of MnBi and MnBiAl films has been investigated in the tem-perature range of 30-400℃. The transition from low-temperature phase to high-temperature phase occurs in both the films, but the phase transitions appear at different temperatures. According to the measurement of Kerr rotation as a function of thermal annealing and the phase transition process, it is shown that the transition is irreversible for MnBi film and reversible for MnBiAl film under our experimental condition. For this reason, we speculate that the aluminum added in MnBi makes the bonding force of Mn atoms with their neighbors stronger, which may be the cause for the difference of the phase transition between MnBi and MnBiAl films.

Abstract: Structural phase transition of MnBi and MnBiAl films has been investigated in the tem-perature range of 30-400℃. The transition from low-temperature phase to high-temperature phase occurs in both the films, but the phase transitions appear at different temperatures. According to the measurement of Kerr rotation as a function of thermal annealing and the phase transition process, it is shown that the transition is irreversible for MnBi film and reversible for MnBiAl film under our experimental condition. For this reason, we speculate that the aluminum added in MnBi makes the bonding force of Mn atoms with their neighbors stronger, which may be the cause for the difference of the phase transition between MnBi and MnBiAl films.

中图分类号:  (Thin film structure and morphology)

  • 68.55.-a
81.40.Gh (Other heat and thermomechanical treatments) 78.20.Ls (Magneto-optical effects) 78.66.Bz (Metals and metallic alloys) 68.60.Dv (Thermal stability; thermal effects)