Unusual spin-glass phase in icosahedral Tb-Mg-Zn quasicrystals
Unusual spin-glass phase in icosahedral Tb-Mg-Zn quasicrystals
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DOI：
10.1103/physrevb.64.224209
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发表时间：
2001-12-01
影响因子：
3.7
通讯作者：
Canfield, PC
中科院分区：
文献类型：
--
作者：
Dolinsek, J;Jaglicic, Z;Canfield, PC
本文用变温磁化强度随时效时间和磁场的变化关系研究了二十面体Th-Mg-Zn准晶在自旋冻结温度以下的自旋态性质。该系统没有表现出高度简并的自由能景观服从亚稳态的超度量组织，这使得它本质上不同于正则自旋玻璃。Th-Mg-Zn系统可以看作是一类特殊的自旋玻璃，它具有一定的局域有序性，但仍然保持自旋冻结的概念。
The nature of the spin state below the spin freezing temperature was studied in an icosahedral Th-Mg-Zn quasicrystal by thermoremanent dc magnetization time decay as a function of aging time and magnetic field. The system does not exhibit a highly degenerate free-energy landscape obeying an ultrametric organization of metastable states, which makes it essentially different from canonical spin glasses. The Th-Mg-Zn system can be considered as a special class of spin glass, which possesses some local order, but still preserves the notion of spin freezing.