EVIDENCE FOR PARALLEL JUNCTIONS WITHIN HIGH-T(C) GRAIN-BOUNDARY JUNCTIONS

被引：42

作者：

EARLY, EA ^{[1
]}

STEINER, RL ^{[1
]}

CLARK, AF ^{[1
]}

CHAR, K ^{[1
]}

机构：

[1] CONDUCTUS INC,SUNNYVALE,CA 94086

来源：

PHYSICAL REVIEW B | 1994年 / 50卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.50.9409

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Half-integral constant voltage steps were observed in many high-T(c) grain-boundary Josephson junctions of YBa2Cu3O7-delta when a microwave field was applied. Five distinct observed behaviors of the widths of both integral and half-integral steps as a function of microwave amplitude, DELTAI(dc)(I(ac)), are reproduced by simulations of two or three junctions in parallel. This provides quantitative evidence that a single high-T(c) grain-boundary junction is composed of several junctions in parallel. These junctions are formed by the overlap of superconducting filaments on either side of the grain boundary, and the spacing between ones with relatively large critical currents is approximately 20 mum.

引用

页码：9409 / 9418

页数：10

共 37 条

[11] SUPERCONDUCTING TRANSPORT-PROPERTIES OF GRAIN-BOUNDARIES IN YBA2CU3O7 BICRYSTALS
DIMOS, D
CHAUDHARI, P
MANNHART, J
[J]. PHYSICAL REVIEW B, 1990, 41 (07): : 4038 - 4049
[12] HALF-INTEGRAL CONSTANT VOLTAGE STEPS IN HIGH-TC GRAIN-BOUNDARY JUNCTIONS
EARLY, EA
CLARK, AF
CHAR, K
[J]. APPLIED PHYSICS LETTERS, 1993, 62 (25) : 3357 - 3359
[13] SUPERCONDUCTING TRANSPORT CHARACTERISTICS OF YBA2CU3O7-DELTA GRAIN-BOUNDARY JUNCTIONS
GROSS, R
CHAUDHARI, P
KAWASAKI, M
GUPTA, A
[J]. IEEE TRANSACTIONS ON MAGNETICS, 1991, 27 (02) : 3227 - 3230
[14] AC JOSEPHSON-LIKE EFFECT WITH LINEAR-PERIODIC CURRENT-PHASE RELATION
GUNDLACH, KH
KADLEC, J
[J]. JOURNAL OF LOW TEMPERATURE PHYSICS, 1977, 26 (3-4) : 603 - 612
[15] ANALOG-COMPUTER STUDIES OF SUBHARMONIC STEPS IN SUPERCONDUCTING WEAK LINKS
HAMILTON, CA
JOHNSON, EG
[J]. PHYSICS LETTERS A, 1972, A 41 (04) : 393 - &
[16] POSSIBLE NEW EFFECTS IN SUPERCONDUCTIVE TUNNELLING
JOSEPHSON, BD
[J]. PHYSICS LETTERS, 1962, 1 (07): : 251 - 253
[17] THE AC JOSEPHSON EFFECT IN HYSTERETIC JUNCTIONS - RANGE AND STABILITY OF PHASE LOCK
KAUTZ, RL
[J]. JOURNAL OF APPLIED PHYSICS, 1981, 52 (05) : 3528 - 3541
[18] 1/F NOISE IN YBA2CU3O7-DELTA SUPERCONDUCTING BICRYSTAL GRAIN-BOUNDARY JUNCTIONS
KAWASAKI, M
CHAUDHARI, P
GUPTA, A
[J]. PHYSICAL REVIEW LETTERS, 1992, 68 (07) : 1065 - 1068
[19] KETCHEN MB, 1985, SQUID 85, P865
[20] LARBALESTIER DC, 1989, PROGR HIGH TEMP SUPE, V18, P128

← 1 2 3 4 →