中国物理B ›› 2013, Vol. 22 ›› Issue (8): 87601-087601.doi: 10.1088/1674-1056/22/8/087601

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Abnormal magnetic behaviors induced by the antisite phase boundary in La2NiMnO6

赵月雷a, 柴一晟b, 潘礼庆c, 孙阳b   

  1. a Department of Physics, University of Science and Technology Beijing, Beijing 100083, China;
    b Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    c College of Science and Research Institute for New Energy, China Three Gorges University, Yichang 443002, China
  • 收稿日期:2013-04-22 修回日期:2013-05-17 出版日期:2013-06-27 发布日期:2013-06-27
  • 基金资助:
    Project supported by the National Key Basic Research Program of China (Grant No. 2011CB921801) and the National Natural Science Foundation of China (Grant Nos. 11074293 and 51021061).

Abnormal magnetic behaviors induced by the antisite phase boundary in La2NiMnO6

Zhao Yue-Lei (赵月雷)a, Chai Yi-Sheng (柴一晟)b, Pan Li-Qing (潘礼庆)c, Sun Young (孙阳)b   

  1. a Department of Physics, University of Science and Technology Beijing, Beijing 100083, China;
    b Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    c College of Science and Research Institute for New Energy, China Three Gorges University, Yichang 443002, China
  • Received:2013-04-22 Revised:2013-05-17 Online:2013-06-27 Published:2013-06-27
  • Contact: Sun Young E-mail:youngsun@iphy.ac.cn
  • Supported by:
    Project supported by the National Key Basic Research Program of China (Grant No. 2011CB921801) and the National Natural Science Foundation of China (Grant Nos. 11074293 and 51021061).

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摘要： The ferromagnetic semiconductor La2NiMnO6 (LNMO) has recently received much attention due to its high Curie temperature (TC ～ 280 K), which is close to room temperature. We prepared single-phase LNMO polycrystalline samples and investigated the temperature-and field-dependent magnetic behaviors of bulk LNMO. Between TC and T*=300 K, we observed upward and downward deviations from the Curie-Weiss law for high and low magnetic fields, respectively. From the electron spin resonance results, we can exclude the existence of the Griffiths phase. On the contrary, our results indicate that the abnormal magnetic behaviors might be induced by antisite phase boundaries with antiferromagnetic interaction.

关键词: antisite phase boundary (APB), La2NiMnO6, electron spin resonance (ESR)

Abstract: The ferromagnetic semiconductor La2NiMnO6 (LNMO) has recently received much attention due to its high Curie temperature (TC ～ 280 K), which is close to room temperature. We prepared single-phase LNMO polycrystalline samples and investigated the temperature-and field-dependent magnetic behaviors of bulk LNMO. Between TC and T*=300 K, we observed upward and downward deviations from the Curie-Weiss law for high and low magnetic fields, respectively. From the electron spin resonance results, we can exclude the existence of the Griffiths phase. On the contrary, our results indicate that the abnormal magnetic behaviors might be induced by antisite phase boundaries with antiferromagnetic interaction.

Key words: antisite phase boundary (APB), La2NiMnO6, electron spin resonance (ESR)

中图分类号:  (Electron paramagnetic resonance and relaxation)

  • 76.30.-v
75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)) 75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects)