LARGE ENHANCEMENT IN OXYGEN MOBILITY IN THE SUPERCONDUCTORS RBA2CU3O7 WITH INCREASING RARE-EARTH SIZE

被引：49

作者：

TALLON, JL ^{[1
]}

MELLANDER, BE ^{[1
]}

机构：

[1] CHALMERS UNIV TECHNOL, DEPT PHYS, S-41296 GOTHENBURG, SWEDEN

来源：

SCIENCE | 1992年 / 258卷 / 5083期

关键词：

D O I：

10.1126/science.258.5083.781

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Ultrasonic composite oscillator measurements of the mechanical relaxation in RBa2Cu3O7-delta arising from oxygen hopping in the basal chain layer show enhancements in oxygen mobility of 20, 50, and 100 times for R = gadolinium, neodymium, and lanthanum, respectively, above that for R = yttrium. The use of the larger rare earths offers a practical solution to the major problem of slow oxygen diffusion in single crystals and bulk, dense material for wires and melt-textured monolithic bodies.

引用

页码：781 / 783

页数：3

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