Relationship between film thickness and the critical current of YBa2Cu3O7-δ-coated conductors

被引：204

作者：

Foltyn, SR ^{[1
]}

Jia, QX ^{[1
]}

Arendt, PN ^{[1
]}

Kinder, L ^{[1
]}

Fan, Y ^{[1
]}

Smith, JF ^{[1
]}

机构：

[1] Univ Calif Los Alamos Natl Lab, Superconduct Technol Ctr, Los Alamos, NM 87545 USA

来源：

APPLIED PHYSICS LETTERS | 1999年 / 75卷 / 23期

关键词：

D O I：

10.1063/1.125431

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

During the development of YBa2Cu3O7-delta (YBCO) coatings on flexible metal tapes, it has become evident that the achievable critical current (I-c) reaches a maximum value of about 200 A per cm of conductor width at a coating thickness of 1-2 mu m. Additional YBCO beyond this thickness can actually reduce I-c. To investigate, critical current density (J(c)) has been measured for samples with YBCO ranging from 0.39 to 6.3 mu m in thickness. Several films were thinned by ion milling and remeasured with two significant results: almost no supercurrent is carried at thickness levels above 2 mu m; and for films thicker than 3 mu m, J(c) is drastically reduced near the substrate as well. (C) 1999 American Institute of Physics. [S0003-6951(99)04249-7].

引用

页码：3692 / 3694

页数：3

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