ANISOTROPIC MAGNETORESISTANCE IN THE NORMAL-STATE OF OXYGEN-DEFICIENT YBA2CU3O7-DELTA THIN-FILMS INDUCED BY SUPERCONDUCTING FLUCTUATIONS

被引：13

作者：

LANG, W

GOB, W

KULA, W

SOBOLEWSKI, R

机构：

[1] UNIV ROCHESTER, DEPT ELECT ENGN, ROCHESTER, NY 14627 USA

[2] UNIV ROCHESTER, LASER ENERGET LAB, ROCHESTER, NY 14627 USA

来源：

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1995年 / 98卷 / 04期

关键词：

D O I：

10.1007/BF01320845

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have investigated both the transverse and the longitudinal magnetoresistance of oxygen-deficient YBa2Cu3O7-delta thin films above their critical temperature T-c = 55 K. The magnetoresistance is solely caused by the magnetic-field suppression of superconducting order-parameter fluctuations, existing in the films up to 143 K, i.e. 2.6 T-c. The fluctuation effect provides a reliable determination of the Ginzburg-Landau coherence lengths, xi(ab) = 2.5nm and xi(c) = 0.09nm, with the anisotropy enhanced by oxygen depletion. No signature of the Maki-Thompson fluctuation process or a magnetoresistance resulting from the cyclotron motion of the normal-state quasiparticles was found.

引用

页码：453 / 456

页数：4