Self-diffusion in the B2-ordered alloy NiGa

被引：2

作者：

Kaisermayr, M

Combet, J

Sepiol, B

Thiess, H

Vogl, G

机构：

[1] Univ Vienna, Inst Mat Phys, A-1090 Vienna, Austria

[2] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France

[3] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[4] Hahn Meitner Inst Kernforsch Berlin GmbH, D-14109 Berlin, Germany

来源：

PHYSICA B | 2000年 / 276卷

基金：

奥地利科学基金会;

关键词：

quasielastic scattering; defects; diffusion;

D O I：

10.1016/S0921-4526(99)01453-2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Quasielastic neutron scattering (QNS) has been used to investigate the self-diffusion of Ni in the intermetallic B2-compound NiGa. Our studies have shown that the Ni-atoms diffuse via nearest-neighbour jumps in contrast to the next-nearest-neighbour jump mechanism proposed an the basis of tracer diffusion experiments. The residence time of the Ni-atoms on the antistructure sites has been found to be of the order of 1/10 of the residence time on the Ni-sublattice. From this proportion the vacancy concentration has been derived. (C) 2000 Elsevier Science B.V. ALI rights reserved.

引用

页码：270 / 271

页数：2

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