THE OXYGEN ISOTOPE EFFECT IN SUPERCONDUCTING YBA2CU3O7-DELTA

被引：30

作者：

FRANCK, JP

JUNG, J

SALOMONS, G

MINER, WA

MOHAMED, MAK

CHRZANOWSKI, J

GYGAX, S

IRWIN, JC

MITCHELL, DF

SPROULE, GI

机构：

[1] SIMON FRASER UNIV,DEPT PHYS,BURNABY V5A 1S6,BC,CANADA

[2] NATL RES COUNCIL CANADA,DIV CHEM,OTTAWA K1A 0R9,ONTARIO,CANADA

来源：

PHYSICA C | 1990年 / 172卷 / 1-2期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/0921-4534(90)90647-W

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on measurements of the effect of O-18-O-16 substitution on the superconducting properties of Y1Ba2Cu3O7-delta. Substitutions were made by gas-exchange alone, and by gas exchange in conjunction with substituted BaCO3 and CuO. From Raman scattering we find that gas-exchange alone leads to lower substitution levels, particularly in the bridging oxygen O(4) position. Gas-exchanged samples give an isotope effect of 0.3 to 0.4 K. Use of substituted materials leads to samples with an isotope effect of up to 0.9 K in the resistance transition and 1.7 K in the magnetically determined transition.

引用

页码：90 / 104

页数：15

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