FLUX CREEP, PINNING POTENTIAL AND CRITICAL CURRENT-DENSITY IN BI2SR2CA1CU2OX SINGLE-CRYSTALS

被引：3

作者：

NAGANO, Y

FUJII, T

SHIRAFUJI, J

机构：

[1] Department of Electrical Engineering, Osaka University, Suita, Osaka

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 1991年 / 30卷 / 4A期

关键词：

OXIDE SUPERCONDUCTOR; BI2SR2CA1CU2OX; FLUX CREEP; PINNING POTENTIAL; CRITICAL CURRENT DENSITY;

D O I：

10.1143/JJAP.30.L568

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Flux creep characteristic at 4.4 K in Bi2Sr2Ca1Cu2O(x) single crystals grown by flux method has been measured as a function of magnetic field applied parallel to the c-axis. The logarithmic relaxation rate of the magnetization dM/d ln t is analyzed on the basis of the flux creep model in combination with an extended Bean's critical state model in which n-th power dependence (0 less-than-or-equal-to n less-than-or-equal-to 1) of critical current density on magnetic field is assumed. The pinning potential and the zero-temperature critical current density are estimated to be 0.014 approximately 0.056 eV and 10(4) approximately 10(5) A/cm2, respectively, depending on oxygen partial pressure of the crystal growth environment.

引用

页码：L568 / L571

页数：4

共 16 条

[1] THEORY OF FLUX CREEP IN HARD SUPERCONDUCTORS [J].

ANDERSON, PW .

PHYSICAL REVIEW LETTERS, 1962, 9 (07) :309-&

[2] FLUX CREEP AND CRITICAL-CURRENT ANISOTROPY IN BI2SR2CACU2O8+DELTA [J].

BIGGS, BD ;

KUNCHUR, MN ;

LIN, JJ ;

POON, SJ ;

ASKEW, TR ;

FLIPPEN, RB ;

SUBRAMANIAN, MA ;

GOPALAKRISHNAN, J ;

SLEIGHT, AW .

PHYSICAL REVIEW B, 1989, 39 (10) :7309-7312

[3] FLUX VORTICES AND TRANSPORT CURRENTS IN TYPE II SUPERCONDUCTORS [J].

CAMPBELL, AM ;

EVETTS, JE .

ADVANCES IN PHYSICS, 1972, 21 (90) :199-+

[4]

FUJII T, IN PRESS J CRYST GRO

[5]

HAZEN RM, 1990, PHYSICAL PROPERTIES, V2, P121

[6] HIGH-FIELD CRITICAL CURRENT DENSITIES IN BI2SR2CA1CU2O8+X/AG WIRES [J].

HEINE, K ;

TENBRINK, J ;

THONER, M .

APPLIED PHYSICS LETTERS, 1989, 55 (23) :2441-2443

[7]

Malozemoff A. P., 1989, Physical properties of high temperature superconductors I, P71

[8] FLUX CREEP IN SINTERED SUPERCONDUCTING Y-BA-CU-O [J].

MATSUSHITA, T ;

FUNABA, S ;

NAGAMATSU, Y ;

NI, B ;

FUNAKI, K ;

YAMAFUJI, K .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 1989, 28 (09) :L1508-L1510

[9]

ROSE RA, 1990, PHYSICA C, V1708, P51

[10] OPTIMIZATION OF SINGLE-CRYSTAL PREPARATION OF BI2SR2CACU2OX SUPERCONDUCTOR BY THE TRAVELING SOLVENT FLOATING ZONE METHOD [J].

SHIGAKI, I ;

KITAHAMA, K ;

SHIBUTANI, K ;

HAYASHI, S ;

OGAWA, R ;

KAWATE, Y ;

KAWAI, T ;

KAWAI, S ;

MATSUMOTO, M ;

SHIRAFUJI, J .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 1990, 29 (11) :L2013-L2016

← 1 2 →