中国物理B ›› 2008, Vol. 17 ›› Issue (11): 4318-4322.doi: 10.1088/1674-1056/17/11/059

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The effect of doped ions on single-molecule magnets of the Mn12-Ac family

曹慧波1, 张俊荣2, 何伦华2, 王芳卫2, 张泮霖2   

  1. (1)Laboratoire L\'eon Brillouin, CEA-CNRS, CE-Saclay, 91191 Gif-sur-Yvette, France; (2)State Key Laboratory of Magnetism, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2008-04-21 修回日期:2008-04-24 出版日期:2008-11-20 发布日期:2008-11-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10505029 and 10375088).

The effect of doped ions on single-molecule magnets of the Mn12-Ac family

Zhang Jun-Rong (张俊荣)a,  He Lun-Hua(何伦华)a, Cao Hui-Bo (曹慧波)b, Wang Fang-Wei (王芳卫)a, Zhang Pan-Lin (张泮霖)a   

  1. a State Key Laboratory of Magnetism, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; b Laboratoire Léon Brillouin, CEA-CNRS, CE-Saclay, 91191 Gif-sur-Yvette, France
  • Received:2008-04-21 Revised:2008-04-24 Online:2008-11-20 Published:2008-11-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10505029 and 10375088).

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摘要： This paper investigates the single-molecule magnets of pure and Cr/Fe-doped Mn$_{12}$-Ac. The components of the mixed crystals are identified by AC susceptibility technique. The ground-state spin and anisotropy parameters of doped \mbox{Mn$_{12}$-Ac} are obtained: (i) \mbox{Mn$_{11}$Cr-Ac} ($S$=19/2, $D$=0.62\,K, $B$=0.0009\,K, $\De$=63\,K), and (ii) \mbox{Mn$_{11}$Fe-Ac} ($S$=21/2, $D$=0.39\,K, $B$=0.001\,K, $\De$=55\,K). The single-ion origin of the magnetic anisotropy is discussed.

关键词: single-molecule magnets, magnetic anisotropy, macroscopic quantum tunnelling

Abstract: This paper investigates the single-molecule magnets of pure and Cr/Fe-doped Mn$_{12}$-Ac. The components of the mixed crystals are identified by AC susceptibility technique. The ground-state spin and anisotropy parameters of doped Mn$_{12}$-Ac are obtained: (i) Mn$_{11}$Cr-Ac ($S$=19/2, $D$=0.62 K, $B$=0.0009 K, $\varDelta$=63 K), and (ii) Mn$_{11}$Fe-Ac ($S$=21/2, $D$=0.39 K, $B$=0.001 K, $\varDelta$=55 K). The single-ion origin of the magnetic anisotropy is discussed.

Key words: single-molecule magnets, magnetic anisotropy, macroscopic quantum tunnelling

中图分类号:  (Magnetic anisotropy)

  • 75.30.Gw
61.72.up (Other materials) 75.30.Cr (Saturation moments and magnetic susceptibilities) 75.50.Xx (Molecular magnets)