Nanostructured high-temperature superconductors: Creation of strong-pinning columnar defects in nanorod/superconductor composites

被引:288
作者
Yang, PD [1 ]
Lieber, CM [1 ]
机构
[1] HARVARD UNIV,DEPT CHEM,CAMBRIDGE,MA 02138
基金
美国国家科学基金会;
关键词
D O I
10.1557/JMR.1997.0393
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A chemical approach to the formation of columnar defects involving the growth and incorporation of MgO nanorods into high temperature superconductors (HTS's) has been developed. MgO nanorods were incorporated into Bi2Sr2CaCu2Oz, Bi2Sr2Ca2Cu3Oz, and Tl2Ba2Ca2Cu3Oz superconductors at areal densities up to 2 x 10(10)/cm(2). Microstructural analyses of the composites demonstrate that the MgO nanorods create a columnar defect structure in the HTS matrices, form a compositionally sharp interface with the matrix, and self-organize into orientations perpendicular and parallel to the copper oxide planes. Measurements of the critical current density demonstrate significant enhancements in the MgO nanorod/HTS composites at elevated temperatures and magnetic fields compared with reference samples.
引用
收藏
页码:2981 / 2996
页数:16
相关论文
共 47 条
  • [1] AN EXPERIMENTAL-STUDY OF FLUX-PINNING AND FLUX DYNAMICS IN A SYSTEM WITH 2 TYPES OF PINNING CENTER
    ADAMOPOULOS, N
    SOYLU, B
    YAN, Y
    EVETTS, JE
    [J]. PHYSICA C, 1995, 242 (1-2): : 68 - 80
  • [2] MAGNETIZATION OF HIGH-FIELD SUPERCONDUCTORS
    BEAN, CP
    [J]. REVIEWS OF MODERN PHYSICS, 1964, 36 (1P1) : 31 - +
  • [3] MAGNETIC FLUX-LINE LATTICES AND VORTICES IN THE COPPER-OXIDE SUPERCONDUCTORS
    BISHOP, DJ
    GAMMEL, PL
    HUSE, DA
    MURRAY, CA
    [J]. SCIENCE, 1992, 255 (5041) : 165 - 172
  • [4] VORTICES IN HIGH-TEMPERATURE SUPERCONDUCTORS
    BLATTER, G
    FEIGELMAN, MV
    GESHKENBEIN, VB
    LARKIN, AI
    VINOKUR, VM
    [J]. REVIEWS OF MODERN PHYSICS, 1994, 66 (04) : 1125 - 1388
  • [5] LASER ABLATED BISMUTH CUPRATE THIN-FILMS PREPARATION AND EFFECT OF OXYGEN NONSTOICHIOMETRY UPON SUPERCONDUCTIVITY
    BROUSSE, T
    POULLAIN, G
    HAMET, JF
    MURRAY, H
    RAVEAU, B
    [J]. PHYSICA C, 1990, 170 (5-6): : 545 - 551
  • [6] GIANT SUPPRESSION OF FLUX-FLOW RESISTIVITY IN HEAVY-ION IRRADIATED TL2BA2CA2CU3O10 FILMS - INFLUENCE OF LINEAR DEFECTS ON VORTEX TRANSPORT
    BUDHANI, RC
    SUENAGA, M
    LIOU, SH
    [J]. PHYSICAL REVIEW LETTERS, 1992, 69 (26) : 3816 - 3819
  • [7] Campbell W. B., 1990, WHISKER TECHNOLOGY, P15
  • [8] VORTEX CONFINEMENT BY COLUMNAR DEFECTS IN YBA2CU3O7 CRYSTALS - ENHANCED PINNING AT HIGH FIELDS AND TEMPERATURES
    CIVALE, L
    MARWICK, AD
    WORTHINGTON, TK
    KIRK, MA
    THOMPSON, JR
    KRUSINELBAUM, L
    SUN, Y
    CLEM, JR
    HOLTZBERG, F
    [J]. PHYSICAL REVIEW LETTERS, 1991, 67 (05) : 648 - 651
  • [9] SYNTHESIS AND CHARACTERIZATION OF CARBIDE NANORODS
    DAI, HJ
    WONG, EW
    LU, YZ
    FAN, SS
    LIEBER, CM
    [J]. NATURE, 1995, 375 (6534) : 769 - 772
  • [10] Macrosegregation of Y2Ba1Cu1O5 particles in Y1Ba2Cu3O7-delta crystals grown by an undercooling method
    Endo, A
    Chauhan, HS
    Egi, T
    Shiohara, Y
    [J]. JOURNAL OF MATERIALS RESEARCH, 1996, 11 (04) : 795 - 803