Measurements of the absolute value of the penetration depth in high-Tc superconductors using a low-Tc superconductive coating

被引：86

作者：

Prozorov, R

Giannetta, RW

Carrington, A

Fournier, P

Greene, RL

Guptasarma, P

Hinks, DG

Banks, AR

机构：

[1] Univ Illinois, Loomis Lab Phys, Urbana, IL 61801 USA

[2] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England

[3] Univ Maryland, Ctr Superconduct Res, Dept Phys, College Pk, MD 20742 USA

[4] Argonne Natl Lab, Div Mat & Chem Sci, Argonne, IL 60439 USA

[5] Univ Illinois, Mat Res Lab, Urbana, IL 61801 USA

来源：

APPLIED PHYSICS LETTERS | 2000年 / 77卷 / 25期

关键词：

D O I：

10.1063/1.1328362

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A method is presented to measure the absolute value of the London penetration depth, lambda (T=0), from the frequency shift of a resonator. The technique involves coating a high-T-c superconductor with film of low-T-c material of known thickness and penetration depth. The method is applied to obtain lambda (YBa2Cu3O7-delta)approximate to 1460 +/- 150 Angstrom, lambda (Bi2Sr2CaCu2O8+delta)approximate to 2690 +/- 150 Angstrom and lambda (Pr1.85Ce0.15CuO4- (delta))approximate to 2790 +/- 150 Angstrom. lambda (YBa2Cu3O7-delta) from this method is very close to that obtained by several other techniques. For both Bi2Sr2CaCu2O8+delta and Pr1.85Ce0.15CuO4-delta the values exceed those obtained by other methods. (C) 2000 American Institute of Physics. [S0003-6951(00)00148-0].

引用

页码：4202 / 4204

页数：3

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