MONTE-CARLO STUDY OF TRACER AND CHEMICAL DIFFUSION OF OXYGEN IN YBA2CU3O6+2C

被引：33

作者：

SALOMONS, E ^{[1
]}

DEFONTAINE, D ^{[1
]}

机构：

[1] UNIV CALIF BERKELEY LAWRENCE BERKELEY LAB,BERKELEY,CA 94720

来源：

PHYSICAL REVIEW B | 1990年 / 41卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.41.11159

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Tracer and chemical diffusion of oxygen in YBa2Cu3O6+2c has been studied by Monte Carlo simulations of an asymmetric next-nearest-neighbor Ising model. Striking differences between tracer and chemical diffusion are found and explained by the effect of the thermodynamic factor, which is determined also by Monte Carlo simulation. Especially for c=0.5, the effect of the thermodynamic factor is large. It is also found that tracer diffusion in the ordered orthorhombic phase of YBa2Cu3O6+2c is strongly anisotropic, which is explained in terms of different diffusion mechanisms. © 1990 The American Physical Society.

引用

页码：11159 / 11167

页数：9

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