X-ray observation of a chemical order driven morphological transition on the surface of an A(3)B type alloy

被引：11

作者：

Barbier, L

Goapper, S

Salanon, B

Caudron, R

Loiseau, A

机构：

[1] OFF NATL ETUD & RECH AEROSP,LAB PHYS SOLIDES,F-92322 CHATILLON,FRANCE

[2] EUROPEAN SYNCHROTRON RADIAT FACIL,F-38043 GRENOBLE,FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.78.3003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Surface induced chemical disorder and step unpairing transition are investigated by gazing x-ray diffraction on a vicinal surface of an A(3)B type alloy (Cu83Pd17). Both transformations occur below and close to the bulk order-disorder transition. The asymmetry of terraces and the order parameter reflecting chemical order in the surface layer are determined by measuring the shape of crystal truncation rods. Step unpairing and surface disordering are found to be continuous transitions.

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页码：3003 / 3006

页数：4

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