INFLUENCE OF BA CONTENT AND CE DOPING ON THE STRUCTURAL FEATURES OF YBA2CU4O8 SUPERCONDUCTOR - A NEUTRON STUDY

被引：2
作者：
SEQUEIRA, A [1 ]
RAJAGOPAL, H [1 ]
GOPALAKRISHNAN, IK [1 ]
YAKHMI, JV [1 ]
IYER, RM [1 ]
机构：
[1] BHABHA ATOM RES CTR,DIV CHEM,BOMBAY 400085,INDIA
来源：
JOURNAL OF SUPERCONDUCTIVITY | 1993年 / 6卷 / 04期
关键词：
YBA2CU4O8; SUPERCONDUCTOR; BA ADDITION; CE DOPING; CU(2)-O(4); CHEMICAL PRESSURE; NEUTRON DIFFRACTION;
D O I：
10.1007/BF00626268
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The structures of A: YBa2Cu4O8 (T(c) = 80 K), B: Y0.9Ce0.1Ba2Cu4O8 (T(c) = 55 K), and C: YBa2.2Cu4O8 (T(c) = 80 K) have been investigated using the powder neutron technique with a view to assessing the influence of the bridging Cu(2)-O(4) and Cu(1)-O(4) bonds on the superconducting transition temperature. The Cu(2)-O(4) bond for samples A and C (with T(c) = 80 K) appears to be compressed as compared to the reported data. On the other hand, the substitution of Ce at 10% Y sites elongates the Cu(2)-O(4) bond substantially and also brings the T(c) down to 55 K. The role of Cu(2)-O(4) bond length as well as other parameters expected to influence the T(c) behavior of Y-124 samples are discussed in the light of the present data. The study also shows that the ambient oxygen pressure route, if tried with the starting composition YBa2.2Cu4Oy, leads to a quite homogeneous 124-phase.
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页码：265 / 272
页数：8
相关论文
共 23 条
  • [1] A PHOTOEMISSION-STUDY (XPS AND UPS) OF THE SUPERCONDUCTOR ERBA2CU4O8 AND COMPARISON WITH YBA2CU3O7-DELTA(DELTA-ALMOST-EQUAL-TO-0, 1)
    ADLER, P
    BUCHKREMERHERMANNS, H
    SIMON, A
    [J]. ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1990, 81 (03): : 355 - 363
  • [2] THE SUPERCONDUCTING PROPERTIES OF YBA2CU4O8 SINGLE-CRYSTALS UNDER HYDROSTATIC-PRESSURE (UP TO 9.5 GPA)
    BRAITHWAITE, D
    CHOUTEAU, G
    MARTINEZ, G
    HODEAU, JL
    MAREZIO, M
    KARPINSKI, J
    KALDIS, E
    RUSIECKI, S
    JILEK, E
    [J]. PHYSICA C, 1991, 178 (1-3): : 75 - 80
  • [3] STRONG PRESSURE-DEPENDENCE OF TC OF THE NEW 80-K PHASE YBA2CU4O8+X
    BUCHER, B
    KARPINSKI, J
    KALDIS, E
    WACHTER, P
    [J]. PHYSICA C, 1989, 157 (03): : 478 - 482
  • [4] STRUCTURAL ANOMALIES AT THE DISAPPEARANCE OF SUPERCONDUCTIVITY IN BA2YCU3O7-DELTA - EVIDENCE FOR CHARGE-TRANSFER FROM CHAINS TO PLANES
    CAVA, RJ
    BATLOGG, B
    RABE, KM
    RIETMAN, EA
    GALLAGHER, PK
    RUPP, LW
    [J]. PHYSICA C, 1988, 156 (04): : 523 - 527
  • [5] HIGH-PRESSURE PREPARATION AND NEUTRON-DIFFRACTION STUDY OF THE HIGH-TC SUPERCONDUCTOR YBA2CU4O8+/-X
    FISCHER, P
    KARPINSKI, J
    KALDIS, E
    JILEK, E
    RUSIECKI, S
    [J]. SOLID STATE COMMUNICATIONS, 1989, 69 (05) : 531 - 533
  • [6] Ginsberg, 1992, PHYSICAL PROPERTIES, P59
  • [7] AMBIENT PRESSURE SYNTHESIS AND NEUTRON STRUCTURE-ANALYSIS OF YBA2CU4O8
    GOPALAKRISHNAN, IK
    YAKHMI, JV
    RAJAGOPAL, H
    SEQUEIRA, A
    IYER, RM
    [J]. PHYSICA C, 1991, 182 (1-3): : 67 - 72
  • [8] THE INFLUENCE OF SUBSTITUTION OF CE ON THE SUPERCONDUCTING BEHAVIOR OF YBA2CU4O8 AND DYBA2CU4O8
    GOPALAKRISHNAN, IK
    YAKHMI, JV
    IYER, RM
    [J]. PHYSICA C, 1993, 204 (3-4): : 413 - 418
  • [9] STRUCTURAL-CHANGES AND REDISTRIBUTION OF HOLES BY SR-DOPING IN YBA2CU4O8
    ISHIGAKI, T
    IZUMI, F
    WADA, T
    SUZUKI, N
    YAEGASHI, Y
    ASANO, H
    YAMAUCHI, H
    TANAKA, S
    [J]. PHYSICA C, 1992, 191 (3-4): : 441 - 449
  • [10] LOW-TEMPERATURE ANOMALIES AND PRESSURE EFFECTS ON THE STRUCTURE AND 80-K OF THE SUPERCONDUCTOR YBA2CU4O8
    KALDIS, E
    FISCHER, P
    HEWAT, AW
    HEWAT, EA
    KARPINSKI, J
    RUSIECKI, S
    [J]. PHYSICA C, 1989, 159 (05): : 668 - 680
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