Increase in the superconducting transition temperature by anisotropic strain effect in (001)La1.85Sr0.15CuO4 thin films on LaSrAlO4 substrates

被引：178
作者：
Sato, H
Naito, M
机构：
[1] NTT Basic Research Laboratories, Wakamiya, Kanagawa, 243-01, 3-1, Morinosato
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1997年 / 274卷 / 3-4期
关键词：
La2-xSrxCuO4; thin films; strain effect; superconducting transition temperature;
D O I：
10.1016/S0921-4534(96)00675-2
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report that (001) La1.85Sr0.15CuO4 thin films on LaSrAlO4 substrates exhibit T-c (R = 0) as high as 44 K, which is significantly higher than those of bulk samples of the same material under ambient pressure. The increase in T-c seems to be due to the plane stress produced by the lattice mismatch between the films and the substrates, which compresses the a-axis of the films, but expands the c-axis. By comparing our results with the previous pressure-effect studies, we suggest that not only the compression of the a-axis but also the expansion of the c-axis may be important in increasing T-c.
引用
收藏
页码：221 / 226
页数：6
相关论文
共 19 条
  • [1] EVIDENCE FOR SUPERCONDUCTIVITY ABOVE 40 K IN THE LA-BA-CU-O COMPOUND SYSTEM
    CHU, CW
    HOR, PH
    MENG, RL
    GAO, L
    HUANG, ZJ
    WANG, YQ
    [J]. PHYSICAL REVIEW LETTERS, 1987, 58 (04) : 405 - 407
  • [2] THICKNESS DEPENDENCE OF LA2-XSRXCUO4 FILMS
    CIEPLAK, MZ
    BERKOWSKI, M
    GUHA, S
    CHENG, E
    VAGELOS, AS
    RABINOWITZ, DJ
    WU, B
    TROFIMOV, IE
    LINDENFELD, P
    [J]. APPLIED PHYSICS LETTERS, 1994, 65 (26) : 3383 - 3385
  • [3] UNIAXIAL PRESSURE-DEPENDENCE OF T(C) FROM HIGH-RESOLUTION DILATOMETRY OF UNTWINNED LA2-XSRXCUO4 SINGLE-CRYSTALS
    GUGENBERGER, F
    MEINGAST, C
    ROTH, G
    GRUBE, K
    BREIT, V
    WEBER, T
    WUHL, H
    UCHIDA, S
    NAKAMURA, Y
    [J]. PHYSICAL REVIEW B, 1994, 49 (18): : 13137 - 13142
  • [4] INPLANE PRESSURE EFFECT IN STRAINED YBA2CU3O7/LA1.85SR0.15CUO4 SUPERLATTICES
    HORIUCHI, K
    KANAI, M
    KAWAI, T
    KAWAI, S
    [J]. PHYSICAL REVIEW B, 1992, 45 (22): : 13152 - 13155
  • [5] INSITU GROWTH AND PROPERTIES OF SINGLE-CRYSTALLINE-LIKE LA2-XSRXCUO4 EPITAXIAL-FILMS BY OFF-AXIS SPUTTERING
    KAO, HL
    KWO, J
    FLEMING, RM
    HONG, M
    MANNAERTS, JP
    [J]. APPLIED PHYSICS LETTERS, 1991, 59 (21) : 2748 - 2750
  • [6] COMPOSITIONAL DEPENDENCE OF TRANSPORT ANISOTROPY IN LARGE (LA, SR)2CUO4 SINGLE-CRYSTALS AND 2ND PEAK IN MAGNETIZATION CURVES
    KIMURA, T
    KISHIO, K
    KOBAYASHI, T
    NAKAYAMA, Y
    MOTOHIRA, N
    KITAZAWA, K
    YAMAFUJI, K
    [J]. PHYSICA C, 1992, 192 (1-2): : 247 - 252
  • [7] UNIAXIAL-STRESS EFFECT ON THE SUPERCONDUCTIVITY OF GRAIN-ALIGNED COMPOSITES OF LA2-XSRXCUO4
    MOTOI, Y
    FUJIMOTO, K
    UWE, H
    SAKUDO, T
    [J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1991, 60 (02) : 384 - 386
  • [8] SUPERCONDUCTING AND EPITAXIAL (TL,PB)SR2CA1-XYXCU2O7 THIN-FILMS BY IN-SITU DEPOSITION
    MYERS, KE
    FACE, DW
    KOUNTZ, DJ
    NESTLERODE, JP
    [J]. APPLIED PHYSICS LETTERS, 1994, 65 (04) : 490 - 492
  • [9] STOICHIOMETRY CONTROL OF ATOMIC-BEAM FLUXES BY PRECIPITATED IMPURITY PHASE DETECTION IN GROWTH OF (PR,CE)(2)CUO4 AND (LA,SR)(2)CUO4 FILMS
    NAITO, M
    SATO, H
    [J]. APPLIED PHYSICS LETTERS, 1995, 67 (17) : 2557 - 2559
  • [10] HALL-COEFFICIENTS AND OPTICAL-PROPERTIES OF LA2-XSRXCUO4 SINGLE-CRYSTAL THIN-FILMS
    SUZUKI, M
    [J]. PHYSICAL REVIEW B, 1989, 39 (04): : 2312 - 2321
12