Penetration depth anisotropy in MgB2 single crystals and powders

被引：3
|
作者：
Cubitt, R
Dewhurst, CD
Eskildsen, MR
Levett, SJ
Matadeen, A
Jun, J
Kazakov, SM
Karpinski, J
Bud'ko, SL
Anderson, NE
Canfield, PC
机构：
[1] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France
[2] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA
[3] ETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland
[4] Ames Lab, Ames, IA 50011 USA
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2006年 / 67卷 / 1-3期
关键词：
superconductors; neutron scattering;
D O I：
10.1016/j.jpcs.2005.10.042
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We present small-angle neutron scattering (SANS) measurements of the vortex lattice in single crystal and powder samples of MgB2-a two band superconductor. SANS is a powerful method allowing us to measure directly the distribution of vortex separations and hence the anisotropy of the penetration depth, gamma(lambda). Single crystal results show the expected rise of gamma(lambda), with applied field as the weaker, almost isotropic, pi-band is suppressed. Results from the powder samples do not show as significant a rise in gamma(lambda) with field. We believe this originates from 'averaged' properties of the penetration depth experienced by vortices in each multi-crystallite powder grain. (c) 2005 Published by Elsevier Ltd.
引用
收藏
页码：493 / 496
页数：4
相关论文
共 50 条
  • [41] Bitter decoration of vortex structure in MgB2 single crystals
    Vinnikov, LY
    Karpinski, J
    Kazakov, SM
    Jun, J
    Anderegg, J
    Bud'ko, SL
    Canfield, PC
    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2003, 385 (1-2): : 177 - 179
  • [42] Structure/Properties Relationships in doped MgB2 Single Crystals
    Schuck, Gotz
    Worle, M.
    Zhigadlo, N. D.
    Rogacki, K.
    Karpinski, J.
    ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES, 2005, 61 : C385 - C385
  • [43] Equilibrium behaviour and vortex pinning in MgB2 single crystals
    Doyle, TB
    Wisniewski, A
    Zehetmayer, M
    Weber, HW
    Karpinski, J
    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2004, 408 : 526 - 528
  • [44] Low temperature dependence of the penetration depth in superconductor MgB2 in the presence and absence of impurities
    Shahzamanian, MA
    Yavary, H
    INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 2004, 18 (03): : 369 - 377
  • [45] Penetration depth calculation in the framework of the two-bands Eliashberg model in MgB2
    Moca, CP
    MODERN PHYSICS LETTERS B, 2002, 16 (5-6): : 195 - 203
  • [46] Pressure effect on the magnetic penetration depth in MgB2 -: art. no. 094504
    Di Castro, D
    Khasanov, R
    Grimaldi, C
    Karpinski, J
    Kazakov, SM
    Brütsch, R
    Keller, H
    PHYSICAL REVIEW B, 2005, 72 (09)
  • [47] Synthesis and processing of MgB2 powders and wires
    Cunningham, CE
    Petrovic, C
    Lapertot, G
    Bud'ko, SL
    Laabs, F
    Straszheim, W
    Finnemore, DK
    Canfield, PC
    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2001, 353 (1-2): : 5 - 10
  • [48] Impurity effects on superconductivity and anisotropy in MgB2
    Tajima, S.
    Masui, T.
    Suemitsu, N.
    Lee, S.
    Kakeshita, T.
    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2007, 460 (SPEC. ISS.): : 74 - 77
  • [49] Effect of Al doping on the irreversible magnetization of MgB2 single crystals
    Kang, Byeongwon
    Lee, Hyun-Sook
    Park, Min-Seok
    Lee, Sung-Ik
    JOURNAL OF THE KOREAN PHYSICAL SOCIETY, 2008, 53 (02) : 1053 - 1056
  • [50] Basic properties and possible high superconducting anisotropy of MgB2 sintered powders and wire segments
    Bud'ko, SL
    Canfield, PC
    Kogan, VG
    ADVANCES IN CRYOGENIC ENGINEERING, VOLS 48A AND B, 2002, 614 : 846 - 855
12345