TRANSPORT CRITICAL CURRENTS IN SPRAY PYROLYZED FILMS OF TLBA2CA2CU3OZ ON POLYCRYSTALLINE ZIRCONIA SUBSTRATES

被引：72

作者：

TKACZYK, JE ^{[1
]}

DELUCA, JA ^{[1
]}

KARAS, PL ^{[1
]}

BEDNARCZYK, PJ ^{[1
]}

GARBAUSKAS, MF ^{[1
]}

ARENDT, RH ^{[1
]}

LAY, KW ^{[1
]}

MOODERA, JS ^{[1
]}

机构：

[1] MIT,FRANCIS BITTER NATL MAGNET LAB,CAMBRIDGE,MA 02139

来源：

APPLIED PHYSICS LETTERS | 1992年 / 61卷 / 05期

关键词：

D O I：

10.1063/1.107852

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Large critical currents with a relatively weak magnetic field dependence are obtained in thick films of TIBa2Ca2Cu3Oz. Transport measurements indicate J(c) > 10(5) A/cm2 at 77 K, zero field, and J(c)> 10(4) at 60 K in a 2 T field applied along the c-axis. The observed behavior is attributed to a large degree of uniaxial alignment of platelike grains, and to superior intragranular flux pinning. These results are consistent with recent theories concerning the nature of vortices in highly anisotropic (layered) superconductors and "brick wall" models of intergranular current transport.

引用

页码：610 / 612

页数：3

共 30 条

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