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

doi:10.1088/1009-1963/16/3/037

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

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)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)

^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/Abstract

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 [Mn_12-xFe_xO₁₂(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 [Mn_12-xFe_xO₁₂(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)

曹慧波, 陈栋梁, 何伦华, 张俊荣, 王芳卫, 吴自玉, 严启伟. Determination of the sites of Fe atoms in Fe-substituted Mn₁₂[J]. 中国物理B, 2007, 16(3): 784-787.

Cao Hui-Bo(曹慧波), Chen Dong-Liang(陈栋梁), He Lun-Hua(何伦华), Zhang Jun-Rong(张俊荣), Wang Fang-Wei(王芳卫), Wu Zi-Yu(吴自玉), and Yan Qi-Wei(严启伟). Determination of the sites of Fe atoms in Fe-substituted Mn₁₂[J]. Chinese Physics, 2007, 16(3): 784-787.

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

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

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