ANGULAR-DEPENDENCE OF FLUX PINNING IN HIGH-TC SUPERCONDUCTING FILMS

被引：6

作者：

HORNG, HE ^{[1
]}

SUNG, HH ^{[1
]}

YAO, BC ^{[1
]}

YANG, HC ^{[1
]}

机构：

[1] NATL TAIWAN UNIV,DEPT PHYS,TAIPEI,TAIWAN

来源：

PHYSICA C | 1991年 / 185卷

关键词：

D O I：

10.1016/0921-4534(91)91235-V

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have investigated the angular dependence of the dissipative characteristics of YBa2Cu3O7-y(YBCO) and Bi2Sr2CaCu2O8-y(BSCCO) films by measuring the resistivity in a field. The dissipation can be described by the thermal activated flux creep model, R = R(o) exp(-U (H,T,THETA)/k(B)T). U depends on the magnetic field as well as the angle, THETA, the magnetic field makes with the c-axis. We found that the activation energy of YBCO films decreases by a factor of 2 while that of BSCCO films decreases by a factor of about 10 in H = 5.5 T and at T/T(c) = 0.93 as one varies THETA from 90-degrees to 0-degrees, where THETA is the angle between the c axis and the direction of the field.

引用

页码：2221 / 2222

页数：2

共 5 条

[1]

PASTRA TTM, 1988, PHYS REV LETT, V61, P1662

[2]

Tinkham M., 1975, INTRO SUPERCONDUCTIV

[3] FORMATION AND SUPERCONDUCTING PROPERTIES OF AS GROWN BI-CA-SR-CU-O FILMS BY AC SPUTTERING [J].