QUASI-STATIC ANELASTIC STUDY OF OXYGEN DIFFUSION IN YBA2CU3OX

被引：7

作者：

SEIDEL, D

HORNES, A

WIPF, H

机构：

来源：

EUROPHYSICS LETTERS | 1992年 / 18卷 / 4BIS期

关键词：

ANELASTICITY; INTERNAL FRICTION AND MECHANICAL RESONANCES; DIFFUSION IN SOLIDS; SUPERCONDUCTING MATERIALS;

D O I：

10.1209/0295-5075/18/4/005

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Quasi-static anelastic experiments on YBa2Cu3Ox (x congruent-to 6.45, T = 100 and 120-degrees-C) demonstrate a relaxation process with a wide spectrum of activation enthalpies H for the relaxation times ([H] congruent-to 1 eV, sigma(H) = (0.07 +/- 0.01) eV) and an extremely large relaxation strength DELTA = 0.75 +/- 0.15. The large DELTA identifies the process as an oxygen redistribution between differently oriented sites in the CuO plane. The relaxation process characterizes the rate-determining step in long-range oxygen diffusion.

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页码：307 / 312

页数：6

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