Spin fluctuations in small γ-Fe precipitates
Spin fluctuations in small γ-Fe precipitates
复制标题
小 γ-Fe 沉淀物中的自旋波动
DOI：
10.1016/0304-8853(93)90867-2
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发表时间：
1993
影响因子：
2.7
通讯作者：
R. Nicklow
中科院分区：
文献类型：
--
作者：
Y. Tsunoda;Y. Nishioka;R. Nicklow
用中子非弹性散射方法研究了Cu中γ-Fe小沉淀物中无公度自旋密度波（SDW）的自旋动力学。在宽SDW卫星峰位置附近甚至在Néel温度以上也观察到强自旋涨落。这不是磁振子激发，因为对于大的γ-FeCo沉淀物，在定义良好的SDW卫星峰位置处没有观察到这种非弹性散射。讨论了CuMn自旋玻璃合金中SDW团簇的相似性。
Spin dynamics of an incommensurate spin-density wave (SDW) in small γ-Fe precipitates in Cu was studied by neutron inelastic scattering. Strong spin fluctuations were observed around the broad SDW satellite peak positions even above the Néel temperature. This is not the magnon excitation because no such inelastic scattering is observed at the well defined SDW satellite peak positions for large γ-FeCo precipitates. Similarities to the SDW clusters in CuMn spin-glass alloys are discussed.