中国物理B ›› 2007, Vol. 16 ›› Issue (3): 784-787.doi: 10.1088/1009-1963/16/3/037

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Determination of the sites of Fe atoms in Fe-substituted Mn12

陈栋梁1, 吴自玉1, 曹慧波2, 何伦华2, 张俊荣2, 王芳卫2, 严启伟2   

  1. (1)Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China; (2)State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
  • 收稿日期:2006-06-26 修回日期:2006-08-08 出版日期:2007-03-20 发布日期:2007-03-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos~10375088 and 10505029).

Determination of the sites of Fe atoms in Fe-substituted Mn12

Cao Hui-Bo(曹慧波)a)† , Chen Dong-Liang(陈栋梁)b), He Lun-Hua(何伦华)a), Zhang Jun-Rong(张俊荣)a), Wang Fang-Wei(王芳卫)a), Wu Zi-Yu(吴自玉)b), and Yan Qi-Wei(严启伟)a)   

  1. a State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; b Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • Received:2006-06-26 Revised:2006-08-08 Online:2007-03-20 Published:2007-03-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos~10375088 and 10505029).

摘要: In this paper neutron diffraction experiments were performed for Fe-substituted Mn12 in order to determine the sites of Fe atoms. The results of structure refinements for the sample with our accessed highest Fe content showed that all Fe atoms occupied Mn(3) sites in the Mn12 skeleton. The x-ray absorption fine structure experiments as well as multiple scattering simulations gave the same result. Thus we concluded that Fe atoms only occupied Mn(3) sites. This conclusion also means that Fe-substituted Mn12 series only includes the four single-molecule magnets of [Mn12-xFexO12(CH3COO)16(H2O)4]\cdot 2CH3COOH\cdot 4H2O (x = 1, 2, 3, and 4), denoted by Mn11Fe1, Mn10Fe2, Mn9Fe3, and Mn8Fe4, respectively.

关键词: single-molecule magnets, neutron diffraction, x-ray absorption fine structure

Abstract: In this paper neutron diffraction experiments were performed for Fe-substituted Mn12 in order to determine the sites of Fe atoms. The results of structure refinements for the sample with our accessed highest Fe content showed that all Fe atoms occupied Mn(3) sites in the Mn12 skeleton. The x-ray absorption fine structure experiments as well as multiple scattering simulations gave the same result. Thus we concluded that Fe atoms only occupied Mn(3) sites. This conclusion also means that Fe-substituted Mn12 series only includes the four single-molecule magnets of [Mn12-xFexO12(CH3COO)16(H2O)4]$\cdot$ 2CH3COOH$\cdot$ 4H2O (x = 1, 2, 3, and 4), denoted by Mn11Fe1, Mn10Fe2, Mn9Fe3, and Mn8Fe4, respectively.

Key words: single-molecule magnets, neutron diffraction, x-ray absorption fine structure

中图分类号:  (Molecular magnets)

  • 75.50.Xx
61.05.fm (Neutron diffraction) 61.66.Fn (Inorganic compounds) 78.70.Dm (X-ray absorption spectra)