Spin dynamics in i-R8Mg42Zn50 quasicrystals (R = Gd, Tb, Dy)
Spin dynamics in i-R8Mg42Zn50 quasicrystals (R = Gd, Tb, Dy)
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DOI：
10.1016/s0921-4526(98)01186-7
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发表时间：
1999-05-01
影响因子：
2.8
通讯作者：
Schmitt, D
中科院分区：
文献类型：
--
作者：
Charrier, B;Cotrell, S;Schmitt, D
利用μ子自旋弛豫实验研究了二十面体R_8Mg_（42）Zn_（50）准晶（R = Gd，Tb，Dy）的自旋动力学.清楚地观察到两个不同的组件，其中之一是一个快速松弛的信号与拉伸指数的形式，在一些无序系统。当温度接近由中子衍射实验定义的有序化温度T-N时，相应的去极化率强烈增加。晶体保持效应似乎是显著的，特别是在镝化合物中。(C)1999 Elsevier Science B. V.保留所有权利。
Spin dynamics has been investigated in icosahedral R8Mg42Zn50 quasicrystals (R = Gd, Tb, Dy) by means of muon spin relaxation experiments. Two distinct components are clearly observed, one of them being a fast relaxing signal with a stretched exponential form as in some disordered systems. The corresponding depolarization rate strongly increases when the temperature approaches the ordering temperature T-N defined by neutron diffraction experiments. Crystal held effects seem to be noticeable, especially in the dysprosium compound. (C) 1999 Elsevier Science B.V. All rights reserved.