CRITICAL-CURRENT FREE-ENERGY RELATIONS IN HIGH-TC SUPERCONDUCTORS

被引：5

作者：

ATHREYA, KS ^{[1
]}

SANDERS, SC ^{[1
]}

HOFREITER, D ^{[1
]}

FINNEMORE, DK ^{[1
]}

XU, YW ^{[1
]}

SUENAGA, M ^{[1
]}

机构：

[1] BROOKHAVEN NATL LAB,UPTON,NY 11973

来源：

PHYSICAL REVIEW B | 1990年 / 41卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.41.264

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Free-energy surfaces of a series of Fe-doped YBa2Cu3O7- have been measured in order to look for a relation between the free energy per unit length of a vortex and the intragranular critical current density. Data for grain-aligned samples with the magnetic field parallel to the c axis show that Fe additions lead to large changes in the thermodynamic variables measured in the reversible region of the H-T plane and correspondingly large changes in the critical current density measured in the irreversible range. Both the free energy per unit length for the vortices and the critical current density fall exponentially with Fe concentration and are roughly proportional to one another. © 1990 The American Physical Society.

引用

页码：264 / 266

页数：3

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