Normal-state resistivity versus critical current in YBa2Cu3O7-δ thin films at high current densities

被引：9

作者：

Currás, SR ^{[1
]}

Viña, J ^{[1
]}

Ruibal, M ^{[1
]}

González, MT ^{[1
]}

Osorio, MR ^{[1
]}

Maza, J ^{[1
]}

Veira, JA ^{[1
]}

Vidal, F ^{[1
]}

机构：

[1] Univ Santiago de Compostela, Dept Fis Mat Condensada, CSIC, ICMM,Lab Baixas Temp & Superconduct, E-15782 Santiago De Compostela, Spain

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2002年 / 372卷

关键词：

transport properties; Y-based cuprates; thin films;

D O I：

10.1016/S0921-4534(02)00851-1

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report measurements at zero applied magnetic field of the normal state resistivity against temperature, p(T), and of the characteristic curves (E-J) in YBa2 Cu3O7-delta thin films. The E-J curves are measured at different temperatures, between 77 K and the superconducting transition temperature., and up to current densities one order of magnitude larger than the critical current density, J(c) with the samples submerged in a liquid nitrogen bath, controlled in temperature by its vapor pressure. These E-J curves allow us to observe the abrupt electric-field jump from the superconducting state to an ohmic highly dissipative state appearing at a current density J much greater than J(c). Our results confirm the absence of any scaling between p and J, for thin films having different structural quality. In contrast, we have found that P scales with the slope of the E-J curves, rho(n) (= E/J), for J > J, which is very close to the extrapolation of the normal-state resistivity to the range of temperatures where the E-J curves are measured, (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：1095 / 1098

页数：4

共 6 条

[1] Critical current density versus normal-state resistivity in granular high-temperature superconductors with different average grain size [J].