THERMODYNAMICS OF SURFACE SEGREGATION PROFILES AT CU3AU(001) RESOLVED BY X-RAY-SCATTERING

被引：87

作者：

REICHERT, H

ENG, PJ

DOSCH, H

ROBINSON, IK

机构：

[1] UNIV ILLINOIS,URBANA,IL 61801

[2] BERG UNIV GESAMTHSCH WUPPERTAL,INST MAT WISSENSCH,D-42285 WUPPERTAL,GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.74.2006

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate that crystal truncation rod scattering can ideally be applied to extract detailed information on surface segregation profiles in multicomponent systems. We present an x-ray study of the surface segregation at Cu3Au(001) at various temperatures above the order-disorder transition temperature. It exhibits a pronounced exponentially decaying, oscillatory behavior versus depth. The associated decay length is found to obey t-, with =0.490.04 and t=(T-TSP)/T, and, thus, is related to the bulk order parameter fluctuations and the bulk spinodal temperature TSP. © 1995 The American Physical Society.

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页码：2006 / 2009

页数：4

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