TRAPPED MAGNETIC-FIELDS IN MELT-TEXTURED YBCO

被引：10

作者：

FRANGI, F ^{[1
]}

JANSAK, L ^{[1
]}

MAJOROS, M ^{[1
]}

ZANNELLA, S ^{[1
]}

机构：

[1] SLOVAK ACAD SCI,INST ELECTROTECH,84239 BRATISLAVA,SLOVAKIA

来源：

PHYSICA C | 1994年 / 224卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(94)90600-9

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The surface of melt-textured bulk YBCO samples, cooled at liquid-nitrogen temperature, was mapped with an automatic Hall probe-based system to study the spatial distribution of trapped magnetic fields. Such a magnetic characterization offers detailed information about the granular structure of differently prepared samples. Both axial and tangential trapped magnetic-field components were measured. the axial component of the trapped magnetic field allows one to obtain the number of grains, their shapes, their dimensions and their locations, while measurements of the tangential component of the trapped magnetic field give complementary information on the grain positions. Intragranular critical current densities were estimated by comparing experimental trapped magnetic-field profiles with theoretical ones calculated using the critical-state model.

引用

页码：20 / 30

页数：11

共 27 条

[1] DEMAGNETIZING FACTORS FOR CYLINDERS [J].

CHEN, DX ;

BRUG, JA ;

GOLDFARB, RB .

IEEE TRANSACTIONS ON MAGNETICS, 1991, 27 (04) :3601-3619

[2] CHARACTERIZATION OF YBA2CU3O7, INCLUDING CRITICAL CURRENT-DENSITY JC, BY TRAPPED MAGNETIC-FIELD [J].

CHEN, IG ;

LIU, JX ;

WEINSTEIN, R ;

LAU, K .

JOURNAL OF APPLIED PHYSICS, 1992, 72 (03) :1013-1020

[3] CALCULATIONS OF THE DIMENSIONAL DEPENDENCE OF THE CRITICAL STATE IN DISK-SHAPED SUPERCONDUCTORS [J].

CONNER, LW ;

MALOZEMOFF, AP .

PHYSICAL REVIEW B, 1991, 43 (01) :402-407

[4] CRITICAL STATE IN DISK-SHAPED SUPERCONDUCTORS [J].

DAUMLING, M ;

LARBALESTIER, DC .

PHYSICAL REVIEW B, 1989, 40 (13) :9350-9353

[5]

DELPRETE C, 1992, 35TH P INT S MAGN BE

[6]

FRANGI F, IN PRESS SUPERCOND S

[7] CRITICAL-STATE MODEL FOR THE DETERMINATION OF CRITICAL CURRENTS IN DISK-SHAPED SUPERCONDUCTORS [J].

FRANKEL, DJ .

JOURNAL OF APPLIED PHYSICS, 1979, 50 (08) :5402-5407

[8]

JANSAK L, 1993, CISESTE9319 FIN REP

[9] FORMATION OF LAYERED MICROSTRUCTURE IN THE Y-BA-CU-O AND BI-SR-CA-CU-O SUPERCONDUCTORS [J].

JIN, S ;

KAMMLOTT, GW ;

TIEFEL, TH ;

CHEN, SK .

PHYSICA C, 1992, 198 (3-4) :333-340

[10] HIGH CRITICAL CURRENTS IN Y-BA-CU-O SUPERCONDUCTORS [J].

JIN, S ;

TIEFEL, TH ;

SHERWOOD, RC ;

DAVIS, ME ;

VANDOVER, RB ;

KAMMLOTT, GW ;

FASTNACHT, RA ;

KEITH, HD .

APPLIED PHYSICS LETTERS, 1988, 52 (24) :2074-2076

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