Spontaneous L12 order at Ni90Al10(110) surfaces:: An X-ray and first-principles-calculation study -: art. no. 236102

被引：49

作者：

Drautz, R

Reichert, H

Fähnle, M

Dosch, H

Sanchez, JM

机构：

[1] Max Planck Inst Met Res, D-70569 Stuttgart, Germany

[2] Univ Texas, Texas Mat Inst, Austin, TX 78712 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.87.236102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have combined x-ray diffraction studies with first-principles calculations to study the interplay between segregation and ordering at the (110) surface of Ni90Al10. We find a L1(2)-ordered monolayer at the surface. The observed ordering as well as recently reported Al segregation at the surface are explained in a consistent picture. A delicate competition between the tendency for Al segregation and ordering in the Ni-Al system induced by the symmetry break at the surface stabilizes a long-range ordered surface in the entire concentration range c(Ni) > 0.75,

引用

页码：236102 / 1

页数：4

共 18 条

[1]

DIEHL HW, 1988, PHASE TRANSITIONS CR, V10

[2] DISORDERED SURFACE SHEETS IN SOLID MATTER NEAR BULK INSTABILITIES [J].