中国物理B ›› 2005, Vol. 14 ›› Issue (9): 1892-1895.doi: 10.1088/1009-1963/14/9/037

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Structure and magnetic properties of a new single-molecule magnet [Mn11Fe1O12 (CH3COO)16(H2O)4].2CH3COOH.4H2O

曹慧波, 何伦华, 王芳卫   

  1. State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
  • 收稿日期:2005-01-12 修回日期:2005-05-31 出版日期:2005-09-20 发布日期:2005-09-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10375088).

Structure and magnetic properties of a new single-molecule magnet [Mn11Fe1O12 (CH3COO)16(H2O)4]$\cdot$2CH3COOH$\cdot$4H2O

Cao Hui-Bo (曹慧波), He Lun-Hua (何伦华), Wang Fang-Wei (王芳卫)   

  1. State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2005-01-12 Revised:2005-05-31 Online:2005-09-20 Published:2005-09-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10375088).

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摘要： A new single-molecule magnet [Mn11Fe1O12 (CH3COO)16(H2O)4]$\cdot$2CH3COOH$\cdot$4H2O (Mn11Fe1) has been synthesized. The structure has been studied by the single crystal x-ray diffraction. The difference of Jahn--Teller distortion between Fe3+ and Mn3+ ion reveals that Fe3+ ion substitutes for Mn3+ ion on the Mn(3) sites in the Mn12 skeleton. The temperature dependence of the magnetization gives a blocking temperature TB=1.9K for Mn11Fe1. Based on the magnetization process analysis of the crystal at T=2K, we suggest that Mn11Fe1 has the ground state with a total spin S= 11/2.

关键词: quantum tunnelling, Jahn--Teller distortion, blocking temperature

Abstract: A new single-molecule magnet [Mn11Fe1O12 (CH3COO)16(H2O)4]?2CH3COOH?4H2O (Mn11Fe1) has been synthesized.The structure has been studied by the single crystal x-ray diffraction. The difference of Jahn--Teller distortion between Fe3+ and Mn3+ ion reveals that Fe3+ ion substitutes for Mn3+ ion on the Mn(3) sites in the Mn12 skeleton. The temperature dependence of the magnetization gives a blocking temperature TB=1.9K for Mn11Fe1. Based on the magnetization process analysis of the crystal at T=2K, we suggest that Mn11Fe1 has the ground state with a total spin S= 11/2.

Key words: quantum tunnelling, Jahn--Teller distortion, blocking temperature

中图分类号:  (Magnetization curves, hysteresis, Barkhausen and related effects)

  • 75.60.Ej
61.66.Hq (Organic compounds) 75.50.Xx (Molecular magnets) 61.05.cp (X-ray diffraction)