PROCESSING HIGH-T(C) SUPERCONDUCTORS WITH GEV HEAVY-IONS

被引：24

作者：

MARWICK, AD

CIVALE, L

KRUSINELBAUM, L

WHEELER, R

THOMPSON, JR

WORTHINGTON, TK

KIRK, MA

SUN, YR

KERCHNER, HR

HOLTZBERG, F

机构：

[1] ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439

[2] OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1993年 / 80-1卷

关键词：

D O I：

10.1016/0168-583X(93)90753-S

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Irradiation of high-T(c) superconducting crystals with low doses (10(10)-10(11) ions/cm2) of GeV heavy ions produces a unique microstructure consisting of discrete amorphous columns which are only a few nm in diameter but tens of mum long. It has been found recently that this columnar microstructure causes larger increases in magnetization and critical current at high temperature and high magnetic field than other types of defects in these materials. This can be understood as a consequence of the effective pinning of magnetic vortex lines provided by the columnar defects. Measurements confirm that the pinning is strongest when the magnetic field is aligned with the ion tracks. Differences in the pinning in different materials can be related to differences in their anisotropy, which affects the structure of the vortices and their pinning at columnar defects.

引用

页码：1143 / 1149

页数：7

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