INFLUENCE OF TWINS ON THE CRITICAL-CURRENT IN YBACUO SINGLE-CRYSTALS

被引:26
作者
DOROSINSKII, LA
NIKITENKO, VI
POLYANSKII, AA
VLASKOVLASOV, VK
机构
[1] Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow distr.
来源
PHYSICA C | 1994年 / 219卷 / 1-2期
关键词
D O I
10.1016/0921-4534(94)90017-5
中图分类号
O59 [应用物理学];
学科分类号
摘要
Induction profiles in an inhomogeneously twinned YBa2Cu3O7-delta single crystal were measured using a recently developed magneto-optic technique. The critical current value J(c) was derived from these profiles and temperature dependences of J(c) for twinned and untwinned regions were built. Twin boundaries are shown to contribute essentially to pinning at temperatures above 45 K, while at lower temperatures other defects dominate. A model is suggested which explains the exponential character of J(c)(T) obtained for the untwinned region.
引用
收藏
页码:81 / 86
页数:6
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共 28 条
  • [1] LARGE ANISOTROPIC CRITICAL MAGNETIZATION CURRENTS IN SINGLE-CRYSTAL YBA2CU3O7-DELTA
    CRABTREE, GW
    LIU, JZ
    UMEZAWA, A
    KWOK, WK
    SOWERS, CH
    MALIK, SK
    VEAL, BW
    LAM, DJ
    BRODSKY, MB
    DOWNEY, JW
    [J]. PHYSICAL REVIEW B, 1987, 36 (07): : 4021 - 4024
  • [2] STUDIES OF HTSC CRYSTAL MAGNETIZATION FEATURES USING INDICATOR MAGNETOOPTIC FILMS WITH INPLANE ANISOTROPY
    DOROSINSKII, LA
    INDENBOM, MV
    NIKITENKO, VI
    OSSIPYAN, YA
    POLYANSKII, AA
    VLASKOVLASOV, VK
    [J]. PHYSICA C, 1992, 203 (1-2): : 149 - 156
  • [3] DETERMINATION OF THE CRITICAL-CURRENT DISTRIBUTION IN 1-2-3 SINGLE-CRYSTALS BY MAGNETIC-FLUX PATTERNS OBSERVED ON THE SAMPLE SURFACE
    DOROSINSKII, LA
    POLYANSKII, AA
    [J]. PHYSICA C, 1993, 212 (1-2): : 211 - 215
  • [4] MAGNETOOPTIC OBSERVATION OF THE MEISSNER EFFECT IN YBA2CU2O7-X SINGLE-CRYSTALS
    DOROSINSKII, LA
    INDENBOM, MV
    NIKITENKO, VI
    POLYANSKII, AA
    PROZOROV, RL
    VLASKOVLASOV, VK
    [J]. PHYSICA C, 1993, 206 (3-4): : 360 - 366
  • [5] THERMAL FLUCTUATIONS OF VORTEX LINES, PINNING, AND CREEP IN HIGH-TC SUPERCONDUCTORS
    FEIGELMAN, MV
    VINOKUR, VM
    [J]. PHYSICAL REVIEW B, 1990, 41 (13): : 8986 - 8990
  • [6] FLUX CREEP AND CURRENT RELAXATION IN HIGH-TC SUPERCONDUCTORS
    FEIGELMAN, MV
    GESHKENBEIN, VB
    VINOKUR, VM
    [J]. PHYSICAL REVIEW B, 1991, 43 (07): : 6263 - 6265
  • [7] THERMALLY ACTIVATED DEPINNING IN POLYCRYSTALLINE BI-BASED HIGH-TC SUPERCONDUCTORS
    GUPTA, A
    ESQUINAZI, P
    BRAUN, HF
    NEUMULLER, HW
    [J]. PHYSICAL REVIEW LETTERS, 1989, 63 (17) : 1869 - 1872
  • [8] SHARP ANGULAR SENSITIVITY OF PINNING DUE TO TWIN BOUNDARIES IN BA2YCU3O7
    GYORGY, EM
    VANDOVER, RB
    SCHNEEMEYER, LF
    WHITE, AE
    OBRYAN, HM
    FELDER, RJ
    WASZCZAK, JV
    RHODES, WW
    HELLMAN, F
    [J]. APPLIED PHYSICS LETTERS, 1990, 56 (24) : 2465 - 2467
  • [9] DISTRIBUTION OF ACTIVATION-ENERGIES FOR THERMALLY ACTIVATED FLUX MOTION IN HIGH-TC SUPERCONDUCTORS - AN INVERSION SCHEME
    HAGEN, CW
    GRIESSEN, R
    [J]. PHYSICAL REVIEW LETTERS, 1989, 62 (24) : 2857 - 2860
  • [10] PINNING IN TWINNED SINGLE-CRYSTALS OF SUPERCONDUCTING REBA2CU3O7-X INVESTIGATED BY TORQUE MAGNETOMETRY
    HERGT, R
    ANDRA, W
    FISCHER, K
    TCHEBOTAEV, NM
    TOWN, SL
    [J]. PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1990, 119 (01): : 241 - 250