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

• 来源期刊: 中国物理（英文版）
• 关键词: single-molecule magnets neutron diffraction x-ray absorption fine structure
• 年，卷（期）: 2007,（3）
• 页码范围: 784-787
• 页数: 4页
• 语种: 英文

摘要

In this paper neutron difiraction 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]·4H2O(x-1,2,3,and 4), denoted by Mn11Fe1,Mn10Fe2,Mn9Fe3,and Mn8Fe4,respectively.