Spin dynamics in Fe2O3-TeO2 glass:: Experimental evidence for an amorphous oxide spin glass

被引：28

作者：

Akamatsu, Hirofumi ^{[1
]}

Tanaka, Katsuhisa ^{[1
]}

Fujita, Koji ^{[1
]}

Murai, Shunsuke ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Engn, Dept Chem Mat, Nishikyo Ku, Kyoto 6158510, Japan

来源：

PHYSICAL REVIEW B | 2006年 / 74卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.74.012411

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

We have examined spin dynamics including magnetic aging and memory effects as well as critical slowing down for 20Fe(2)O(3)center dot 80TeO(2) (mol %) glass. Scaling analysis on critical slowing down reveals that the present glass exhibits a critical behavior as observed in a prototype of spin glasses. Aging and memory effects peculiar to spin glasses have been observed in the magnetically ordered phase of the present glass. These experimental results strongly confirm that the 20Fe(2)O(3)center dot 80TeO(2) glass is converted into a spin glass phase at a very low temperature. It is thought that a disordered structure of the oxide glass gives rise to randomness and frustration in the magnetic structure, leading to the spin glass phase transition.

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页数：4

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