Quantum tunneling of vortices in Bi-2212 with randomly oriented columnar defects

被引：0
|
作者：
Thompson, JR
Ossandon, JG
Krusin-Elbaum, L
Song, KJ
Christen, DK
Ullmann, JL
机构：
[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
[2] Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA
[3] Univ Talca, Curico, Chile
[4] IBM Corp, Watson Res Ctr, Yorktown Heights, NY USA
[5] Univ Calif Los Alamos Natl Lab, Los Alamos, NM USA
来源：
PHYSICA B | 2000年 / 284卷 / 284期
基金：
美国国家科学基金会;
关键词：
columnar defects; flux creep; irradiation; Bi-2212; quantum vortex tunneling;
D O I：
10.1016/S0921-4526(99)02196-1
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Vortex pinning in textured Bi-2212/Ag superconducting tapes was enhanced by randomly oriented columnar defects, formed by GeV proton-induced fission of Bi-nuclei. Studies of J versus time in the range 2-40 K shows that thermally activated current decay decreased greatly. However, temperature-independent quantum tunneling of vortices considerably limits J and its temporal stability for a significant fraction of the finite-J(c) region. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：877 / 878
页数：2
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