Determination of the sites of Fe atoms in Fe-substituted Mn12
Chen Dong-Lianga, Wu Zi-Yua, Cao Hui-Bob, He Lun-Huab, Zhang Jun-Rongb, Wang Fang-Weib, Yan Qi-Weib
a Institute of High Energy Physics, Chinese Academy of Sciences,
Beijing 100049, China; b State Key Laboratory of Magnetism, Institute of Physics,
Chinese Academy of Sciences, Beijing 100080, China
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.
Received: 26 June 2006
Revised: 08 August 2006
Published: 20 March 2007
Fund: Project supported by the National Natural Science Foundation of China
(Grant Nos~10375088 and 10505029).
Cite this article:
Chen Dong-Liang, Wu Zi-Yu, Cao Hui-Bo, He Lun-Hua, Zhang Jun-Rong, Wang Fang-Wei, Yan Qi-Wei Determination of the sites of Fe atoms in Fe-substituted Mn12 2007 Chin. Phys. 16 784
