OBSERVATION OF AN OXYGEN ISOTOPE EFFECT IN SUPERCONDUCTING (Y1-XPRX)BA2CU3O7-DELTA

被引：169
作者：
FRANCK, JP
JUNG, J
MOHAMED, MAK
GYGAX, S
SPROULE, GI
机构：
[1] SIMON FRASER UNIV,DEPT PHYS,BURNABY V5A 1S6,BC,CANADA
[2] NATL RES COUNCIL CANADA,INST MICROSTRUCT SCI,OTTAWA K1A 0R9,ONTARIO,CANADA
来源：
PHYSICAL REVIEW B | 1991年 / 44卷 / 10期
关键词：
D O I：
10.1103/PhysRevB.44.5318
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The oxygen isotope effect was studied in the system (Y(1-x)Pr(x))Ba2Cu3O7-delta for x = 0.2, 0.3, 0.4, and 0.5. It is found that the oxygen isotope exponent a increases with increasing x and therefore decreasing transition temperature T(c). For the highest Pr concentrations-alpha tends toward alpha = 0.5. The value of the isotope exponent depends on the concentration of mobile holes. The lower this concentration is, the larger becomes the isotope exponent.
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页码：5318 / 5321
页数：4
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