| Resonant tunnelling of the magnetization in molecular crystal of [（Mn1-xCrx）12O12 （CH3COO）16（H2O）4]·2CH3COOH·4H2O（x=0,0.03,0.04,0.05） |
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| 引用本文： | 何光,何伦华,张俊荣,曹慧波,阎丽琴,王芳卫,严启伟.Resonant tunnelling of the magnetization in molecular crystal of [（Mn1-xCrx）12O12 （CH3COO）16（H2O）4]·2CH3COOH·4H2O（x=0,0.03,0.04,0.05）[J].中国物理 B,2007,16(6):776-1779. |
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| 作者姓名： | 何光 何伦华 张俊荣 曹慧波 阎丽琴 王芳卫 严启伟 |
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| 作者单位： | [1]School of Physics ＆ Electronic Engineering, The Central University of Nationalities, Beijing 100081, China [2]State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （Grant No 10505029）. |
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| 摘 要： | The quantum tunnelling of magnetization （QTM） in single crystals of the single molecule magnet （Mn1-xCrx）12- Ac （x=0, 0.03, 0.04, 0.05） has been investigated. In comparison with its parent Mnl2-Ac, a greater rate of magnetization relaxation and a lower effective potential-energy barrier have been observed in Cr-doping samples. This modulation of QTM due to the Cr-doping could be attributed to the small change of Sz due to the smaller spin of Cr itself and additional intrinsic but distributed transverse and longitudinal anisotropy raised by a subtle change of the local environment in the magnetic Mn12 core.
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| 关 键 词： | 分子晶体 单分子磁体 共振 磁化 量子隧穿效应 锰 铬 |
| 修稿时间： | 2006-10-24 |
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