ATOMISTIC DETERMINATION OF DIFFUSION MECHANISM ON AN ORDERED LATTICE

被引：68

作者：

SEPIOL, B

VOGL, G

机构：

[1] Institut für Festkörperphysik der Universität Wien, A-1090 Wien

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.71.731

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

By high-temperature Fe-57 Mossbauer spectroscopy on single crystals the diffusion mechanism in an ordered structure (stoichiometric Fe3Si) has been studied on an atomic scale. From the widths and the weights of the quasielastic lines in appropriately chosen crystal directions one can directly infer the elementary diffusion jump mechanism: For the stoichiometric alloy Fe3Si jumps via the three iron sublattices dominate. At only slightly higher iron concentrations (off stoichiometry), however, jumps via antistructure sites on the silicon sublattice contribute strongly.

引用

页码：731 / 734

页数：4

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