Superconducting properties of silver-doped YBa2Cu4O8 and Y0.9Ca0.1Ba2Cu4O8

被引：1
作者：
Zheng, XG [1 ]
Matsui, H
Tanaka, S
Suzuki, M
Xu, CN
Shobu, K
机构：
[1] Saga Univ, Dept Phys, Saga 840, Japan
[2] AIST, Tosu, Saga 841, Japan
来源：
MATERIALS RESEARCH BULLETIN | 1998年 / 33卷 / 08期
关键词：
superconductors; chemical synthesis; electrical properties;
D O I：
10.1016/S0025-5408(98)00102-0
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
High-temperature superconductors YBa2Cu4O8 and Y0.9Ca0.1Ba2Cu4O8 and their composites with varied quantities of Ag2O were prepared using a modified solid-state reaction method. The critical transport current density, J(c), was measured extensively at temperatures below the superconducting transition temperature. A remarkable increase (greater than one order of magnitude) in J(c) was obtained for both superconductors by optimum silver addition. Reduction of the characteristic porosity in the 124 superconductors was found to be the origin of this unusual J(c) enhancement. (C) 1998 Elsevier Science Ltd.
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页码：1213 / 1219
页数：7
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共 41 条
  • [1] SYNTHESIS OF LNBA2CU4O8 (LN=RARE EARTH ELEMENTS) CERAMICS AT ONE ATMOSPHERE OXYGEN-PRESSURE
    ADACHI, S
    ADACHI, H
    SETSUNE, K
    WASA, K
    [J]. PHYSICA C, 1991, 175 (5-6): : 523 - 528
  • [2] A SIMPLE ROUTE TO SINGLE-PHASE YBA2CU4O8 AT AMBIENT-PRESSURE
    ADACHI, S
    SUGANO, T
    FUKUOKA, A
    SEIJI, N
    ITOH, M
    LAFFEZ, P
    YAMAUCHI, H
    [J]. PHYSICA C, 1994, 233 (1-2): : 149 - 154
  • [3] SYNTHESIS OF 80-K SUPERCONDUCTING YBA2CU4O8 VIA A NOVEL ROUTE
    BALACHANDRAN, U
    BIZNEK, ME
    TOMLINS, GW
    VEAL, BW
    POEPPEL, RB
    [J]. PHYSICA C, 1990, 165 (3-4): : 335 - 339
  • [4] SPECIFIC-HEAT, MAGNETIZATION AND RESISTIVITY MEASUREMENTS ON HOBA2CU4O8
    BERNASCONI, A
    SCHILLING, A
    GUO, JD
    OTT, HR
    [J]. PHYSICA C, 1990, 166 (5-6): : 393 - 398
  • [5] HIGH-PURITY SYNTHESIS OF YBA2CU4O8 AT LOW OXYGEN-PRESSURE
    BONOLDI, L
    SPARPAGLIONE, M
    ZINI, L
    [J]. APPLIED PHYSICS LETTERS, 1992, 61 (08) : 964 - 966
  • [6] CALCIUM-SUBSTITUTED SUPERCONDUCTING RBA2CU4O8 WITH TC-OKSIMLR-90-K PREPARED AT ONE ATMOSPHERE
    BUCKLEY, RG
    TALLON, JL
    POOKE, DM
    PRESLAND, MR
    [J]. PHYSICA C, 1990, 165 (5-6): : 391 - 396
  • [7] SYNTHESIS OF BULK SUPERCONDUCTING YBA2CU4O8 AT ONE ATMOSPHERE OXYGEN-PRESSURE
    CAVA, RJ
    KRAJEWSKI, JJ
    PECK, WF
    BATLOGG, B
    RUPP, LW
    FLEMING, RM
    JAMES, ACWP
    MARSH, P
    [J]. NATURE, 1989, 338 (6213) : 328 - 330
  • [8] A STRAIGHTFORWARD SYNTHETIC ROUTE TO THE BULK FORM OF THE ERBA2CU4O8, HOBA2CU4O8 SUPERCONDUCTORS AT ONE ATMOSPHERE OXYGEN-PRESSURE
    CAVA, RJ
    KRAJEWSKI, JJ
    PECK, WF
    BATLOGG, B
    RUPP, LW
    [J]. PHYSICA C, 1989, 159 (04): : 372 - 374
  • [9] EFFECT OF AG2O ADDITION IN Y0.9CA0.1BA2CU4O8 ON THE CONTACT CHARACTERISTICS OF Y0.9CA0.1BA2CU4O8/AG INTERFACE
    CHEN, YC
    YANG, CK
    MEEN, TH
    YANG, HD
    [J]. APPLIED PHYSICS LETTERS, 1994, 65 (26) : 3392 - 3394
  • [10] Sol-gel process for preparation of YBa2Cu4O8 from acidic acetates/ammonia/ascorbic acid systems
    Deptula, A
    Lada, W
    Olczak, T
    Goretta, KC
    DiBartolomeo, A
    Casadio, S
    [J]. MATERIALS RESEARCH BULLETIN, 1997, 32 (03) : 319 - 325
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