REDUCING VORTEX MOTION IN YBA2CU3O7 CRYSTALS WITH SPLAY IN COLUMNAR DEFECTS

被引：103
作者：
CIVALE, L
KRUSINELBAUM, L
THOMPSON, JR
WHEELER, R
MARWICK, AD
KIRK, MA
SUN, YR
HOLTZBERG, F
FEILD, C
机构：
[1] IBM RES,YORKTOWN HTS,NY 10598
[2] OAK RIDGE NATL LAB,OAK RIDGE,TN 37831
[3] UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996
[4] ARGONNE NATL LAB,ARGONNE,IL 60439
来源：
PHYSICAL REVIEW B | 1994年 / 50卷 / 06期
关键词：
D O I：
10.1103/PhysRevB.50.4102
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A strategy to boost the current-carrying capacity of cuprate superconductors beyond the levels attainable with parallel columnar defects was recently proposed. It consists of the enforcement of vortex entanglement by controlled splay of columns. We demonstrate the validity of this suggestion in YBa2Cu3O2 single crystals using the difference in splay naturally occurring in irradiations with two ions differing in mass and energy. The terminal dispersion of the columns produced by 0.58-GeV Sn-116(30+) is about 10-degrees, as compared with 1-degrees for 1.08-GeV Au-197(23+). At high temperatures, this large splay results in a persistent current density one order of magnitude larger and a creep rate one order of magnitude smaller.
引用
收藏
页码：4102 / 4109
页数：8
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