Observation of quasimagnetic structures in rare-earth-based icosahedral quasicrystals
Observation of quasimagnetic structures in rare-earth-based icosahedral quasicrystals
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DOI：
10.1103/physrevlett.78.4637
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发表时间：
1997-06-16
影响因子：
8.6
通讯作者：
Schmitt, D
中科院分区：
文献类型：
--
作者：
Charrier, B;Ouladdiaf, B;Schmitt, D
首次在准晶中观察到长程准周期反铁磁结构，即重稀土基二十面体化合物R_8Mg_（42）Zn_（50）（R = Tb，Dy，Ho，Er）。这种准磁有序的特征在于六维符号中的传播矢量Q =（1/4，0，0，0，0）。同时，宽磁峰出现在中子衍射图案，特征的短程有序。两种不同的磁相关长度的共存表明存在两种类型的稀土原子的晶体学网站。
The first observation of long-range quasiperiodic antiferromagnetic structures in quasicrystals, namely the heavy rare-earth-based icosahedral R8Mg42Zn50 compounds (R = Tb, Dy, Ho, Er), is reported. This quasimagnetic ordering is characterized by the propagation vector Q = (1/4,0,0,0,0,0) in the six-dimensional notation. Simultaneously, broad magnetic peaks appear in the neutron diffraction patterns, characteristic of a short-range ordering. The coexistence of two different magnetic correlation lengths suggests the presence of two types of crystallographic sites for the rare-earth atoms.