SAMPLE-SIZE EFFECT ON THE DETERMINATION OF THE IRREVERSIBILITY LINE OF HIGH-T-C SUPERCONDUCTORS

被引：17

作者：

LI, Q ^{[1
]}

SUENAGA, M ^{[1
]}

LI, Q ^{[1
]}

FRELTOFT, T ^{[1
]}

机构：

[1] NKT,RES CTR,DK-2605 BRONDBY,DENMARK

来源：

APPLIED PHYSICS LETTERS | 1994年 / 64卷 / 02期

关键词：

D O I：

10.1063/1.111519

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The irreversibility lines of a high-J(c) superconducting Bi2Sr2Ca2Cu3Ox/Ag tape were systematically measured upon a sequence of subdivisions of the sample. The irreversibility field H-r(T) (parallel to the c axis) was found to change approximately as L(0.13), where L is the effective dimension of the superconducting tape. Furthermore, it was found that the irreversibility line for a grain-aligned Bi2Sr2Ca2Cu3Ox specimen can be approximately reproduced by the extrapolation of this relation down to a grain size of a few tens of micrometers. The observed size effect could significantly obscure the real physical meaning of the irreversibility lines. In addition, this finding surprisingly indicated that the Bi2Sr2Ca2Cu2Ox/Ag tape and grain-aligned specimen may have similar flux line pinning strength.

引用

页码：250 / 252

页数：3

共 12 条

[1] MAGNETIZATION OF HARD SUPERCONDUCTORS [J].

BEAN, CP .

PHYSICAL REVIEW LETTERS, 1962, 8 (06) :250-+

[2]

BRANDT EH, 1993, PHASE TRANSITIONS RE

[3] IDENTIFYING THE LOSS OF CRITICAL CURRENT-DENSITY IN YBA2CU3O7 THIN-FILMS [J].

DEAK, J ;

MCELFRESH, M ;

CLEM, JR ;

HAO, ZD ;

KONCZYKOWSKI, M ;

MUENCHAUSEN, R ;

FOLTYN, S ;

DYE, R .

PHYSICAL REVIEW B, 1993, 47 (13) :8377-8380

[4] ELECTROMAGNETIC PROPERTIES AND MORPHOLOGY OF AG-SHEATHED BI-PB-SR-CA-CU-O SUPERCONDUCTING WIRES [J].

HIKATA, T ;

NISHIKAWA, T ;

MUKAI, H ;

SATO, K ;

HITOTSUYANAGI, H .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 1989, 28 (07) :L1204-L1206

[5]

LI Q, IN PRESS PHYSICA C

[6] BEHAVIOR OF CRITICAL CURRENTS IN BI-PB-SR-CA-CU-O/AG TAPES FROM TRANSPORT AND MAGNETIZATION MEASUREMENTS - DEPENDENCE UPON TEMPERATURE, MAGNETIC-FIELD, AND FIELD ORIENTATION [J].

MALEY, MP ;

KUNG, PJ ;

COULTER, JY ;

CARTER, WL ;

RILEY, GN ;

MCHENRY, ME .

PHYSICAL REVIEW B, 1992, 45 (13) :7566-7569

[7] FLUX TRAPPING AND SUPERCONDUCTIVE GLASS STATE IN LA2CUO4-Y-BA [J].

MULLER, KA ;

TAKASHIGE, M ;

BEDNORZ, JG .

PHYSICAL REVIEW LETTERS, 1987, 58 (11) :1143-1146

[8] IRREVERSIBILITY TEMPERATURES OF NB3SN AND NB-TI [J].

SUENAGA, M ;

GHOSH, AK ;

XU, YW ;

WELCH, DO .

PHYSICAL REVIEW LETTERS, 1991, 66 (13) :1777-1780

[9]

SUENAGA M, 1992, SUPERCOND SCI TECH, V5, P1

[10] CRITICAL-STATE SCALING AND WEAK LINKS IN AG-SHEATHED BI2SR2CA2CU3OZ [J].

TKACZYK, JE ;

ARENDT, RH ;

GARBAUSKAS, MF ;

HART, HR ;

LAY, KW ;

LUBORSKY, FE .

PHYSICAL REVIEW B, 1992, 45 (21) :12506-12512

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