LEED STUDY OF PT25CO75(111)

被引：32

作者：

GAUTHIER, Y

BAUDOINGSAVOIS, R

ROSINK, JJWM

SOTTO, M

机构：

[1] UNIV TECHNOL EINDHOVEN,5600 MB EINDHOVEN,NETHERLANDS

[2] UNIV PARIS 06,PHYS SOLIDES LAB,F-75005 PARIS,FRANCE

[3] UNIV PARIS 07,PHYS SOLIDES LAB,F-75221 PARIS 05,FRANCE

来源：

SURFACE SCIENCE | 1993年 / 297卷 / 02期

关键词：

D O I：

10.1016/0039-6028(93)90263-J

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A quantitative LEED study of the Pt25Co75(111) surface (in the substitutionally disordered state) shows weak relaxations of interlayer spacings (DELTAd12/d(bulk), DELTAd23/d(bulk), DELTAd34/d(bulk))= (-1.9, approximately 1.4, 3.6)%, no stacking fault with respect to the ABC stacking but a significant oscillatory composition profile (C1, C2, C3) = (46, 3, 37) at% Pt. This behaviour is very close to the general trend observed for PtNi(111) surfaces as a function of the bulk concentration Cb and in good agreement with the predictions of the tight binding Ising model of Treglia, Legrand and Ducastelle and of the embedded atom method results of Lundberg.

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页码：193 / 201

页数：9

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