Anomalous Temperature Dependence of the X-Ray Diffuse Scattering Intensity of Cu>3Au.
Anomalous Temperature Dependence of the X-Ray Diffuse Scattering Intensity of Cu>3Au.
复制标题
Cu>3Au 的 X 射线漫散射强度的反常温度依赖性。
作者：
Reichert;Moss;Liang
Cu{sub 3}Au(110) 晶体的平衡扩散 X 射线散射的精细结构揭示了与费米表面成像相关的四重峰分裂的意外温度依赖性。分裂扩散最大值的分离随着温度的增加而增加，对应于真实空间图片中相关微域的增殖。由于当前基于构型能计算的合金理论并未涵盖这种与温度相关的微观结构，因此本研究的结果概述了熵对合金自由能贡献的重要性。 {版权} {ital 1996 美国物理学会。}
The fine structure of the equilibrium diffuse x-ray scattering of a Cu{sub 3}Au(110) crystal reveals an unexpected temperature dependence of the fourfold peak splitting associated with Fermi surface imaging. The separation of the split diffuse maxima increases with temperature corresponding to a proliferation of correlated microdomains in a real space picture. As current alloy theories based on the calculation of the configurational energy do not cover such a temperature dependent microstructure, the results of this study outline the importance of the entropy contribution to the alloy free energy. {copyright} {ital 1996 The American Physical Society.}