VORTEX-LATTICE TRANSITION IN SUPERCONDUCTING NB/NBZR MULTILAYERS

被引:34
作者
KOOREVAAR, P
MAJ, W
KES, PH
AARTS, J
机构
[1] Kamerlingh Onnes Laboratorium, Rijksuniversiteit Leiden, 2300 RA Leiden
来源
PHYSICAL REVIEW B | 1993年 / 47卷 / 02期
关键词
D O I
10.1103/PhysRevB.47.934
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Multilayers of Nb/NbZr are known to show two dimensional crossovers [three dimensional (3D) to two dimensional (2D) to 3D] in the behavior of the parallel critical field H(c2 parallel-to) as a function of temperature T. Here we report a systematic study of the behavior of the critical current I(c) as function of the magnetic field H in the different regimes. Varied were layer thicknesses as well as the angle between H and the sample surface, and the angle between H and the current I. Apart from earlier reported non-monotonic behavior of I(c)(H), which constitutes the continuation of the 2D behavior in the H(parallel-to)(T) phase diagram, we find strong maxima in I(c) at fields H(p) far below the 2D phase line. An analysis in terms of Lorentz forces on the flux lines shows that H(p) signifies a transition from a low-field region where straight vortices move freely in a direction perpendicular to the layers, to a high-field region where the vortices have developed kinks perpendicular to the layers. In this field regime I(c) is determined by motion of the kinks along the layers, while the portions of the vortex parallel to the layers are pinned by an intrinsic mechanism.
引用
收藏
页码:934 / 943
页数:10
相关论文
共 26 条
[1]   DIMENSIONALITY CROSSOVERS IN THE PARALLEL CRITICAL FIELDS OF NB/NB0.6ZR0.4 MULTILAYERS [J].
AARTS, J ;
DEKORVER, KJ ;
KES, PH .
EUROPHYSICS LETTERS, 1990, 12 (05) :447-452
[2]   THE CRUCIAL EFFECT OF THE OUTER LAYERS ON THE CRITICAL FIELDS OF NB/NBZR-TYPE SUPERCONDUCTING SUPERLATTICES [J].
AARTS, J ;
MAJ, W ;
DEKORVER, KJ ;
KOOREVAAR, P ;
KES, PH .
PHYSICA C, 1991, 185 :2071-2072
[3]   PINNING EFFECT DUE TO PERIODIC VARIATION OF IMPURITY CONCENTRATION IN TYPE-II SUPERCONDUCTORS [J].
AMI, S ;
MAKI, K .
PROGRESS OF THEORETICAL PHYSICS, 1975, 53 (01) :1-20
[4]   ANISOTROPIC CRITICAL FIELDS IN SUPERCONDUCTING SUPER-LATTICES [J].
BANERJEE, I ;
YANG, QS ;
FALCO, CM ;
SCHULLER, IK .
PHYSICAL REVIEW B, 1983, 28 (09) :5037-5040
[5]   2-DIMENSIONAL VORTICES IN A STACK OF THIN SUPERCONDUCTING FILMS - A MODEL FOR HIGH-TEMPERATURE SUPERCONDUCTING MULTILAYERS [J].
CLEM, JR .
PHYSICAL REVIEW B, 1991, 43 (10) :7837-7846
[6]  
DEUTSCHER G, 1969, SUPERCONDUCTIVITY, V2, pCH17
[7]   INTRINSIC PINNING AND LOCK-IN TRANSITION OF FLUX LINES IN LAYERED TYPE-II SUPERCONDUCTORS [J].
FEINBERG, D ;
VILLARD, C .
PHYSICAL REVIEW LETTERS, 1990, 65 (07) :919-922
[8]   THERMAL FLUCTUATIONS, QUENCHED DISORDER, PHASE-TRANSITIONS, AND TRANSPORT IN TYPE-II SUPERCONDUCTORS [J].
FISHER, DS ;
FISHER, MPA ;
HUSE, DA .
PHYSICAL REVIEW B, 1991, 43 (01) :130-159
[9]   FLUX CREEP AND FLUX PINNING IN LAYERED HIGH-TEMPERATURE SUPERCONDUCTORS [J].
IVLEV, BI ;
KOPNIN, NB .
PHYSICAL REVIEW LETTERS, 1990, 64 (15) :1828-1830
[10]   ANOMALOUS UPPER CRITICAL FIELDS OF SUPERCONDUCTING MULTILAYERS - VERIFICATION OF THE TAKAHASHI-TACHIKI EFFECT [J].
KARKUT, MG ;
MATIJASEVIC, V ;
ANTOGNAZZA, L ;
TRISCONE, JM ;
MISSERT, N ;
BEASLEY, MR ;
FISCHER, O .
PHYSICAL REVIEW LETTERS, 1988, 60 (17) :1751-1754