Reactive nanostructured carbon as an effective doping agent for MgB2

被引：23
作者：
Gruner, W. [1 ]
Herrmann, M. [1 ]
Nilsson, A. [1 ]
Hermann, H. [1 ]
Hassler, W. [1 ]
Holzapfel, B. [1 ]
机构：
[1] Leibniz Inst Solid State & Mat Res, D-01171 Dresden, Germany
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2007年 / 20卷 / 07期
关键词：
D O I：
10.1088/0953-2048/20/7/003
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
AMgB(2-x)C(x) superconductor was prepared with reactive nanostructured carbon up to nominal x = 0.316 by high- energy ball milling. These products crystallize at temperatures below 700 degrees C, forming mainly MgB2-xCx with a particle size of about 20 nm and with lattice- dissolved carbon content up to about x = 0.13 under normal pressure conditions, and minor MgB4. The nominal higher addition of reactive nanostructured carbon does not have an influence on the a- axis of the MgB2-xCx structure. The superconducting behaviour reflects the optimum interplay of the lattice- dissolved carbon, which influences the carrier density, and the homogeneously distributed carbon, which probably acts as a pinning centre. For the sample with a nominal x = 0.221, the critical current density ( J(c)) increased by approximately one order of magnitude to J(c) = 1.7 x 10(4) A cm(-2) at 9 T and 4.2 K compared to the undoped MgB2.
引用
收藏
页码：601 / 606
页数：6
相关论文
共 39 条
  • [1] Co-addition into WgB2:: The structural and electronic properties of (MgB2)2-xCox
    Aksan, M. A.
    Yakinci, M. E.
    Guldeste, A.
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2006, 424 (1-2) : 33 - 40
  • [2] Peculiarities in the carbon substitution of MgB2
    Balaselvi, SJ
    Gayathri, N
    Bharathi, A
    Sastry, VS
    Hariharan, Y
    [J]. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2004, 407 (1-2): : 31 - 38
  • [3] MAGNETIZATION OF HIGH-FIELD SUPERCONDUCTORS
    BEAN, CP
    [J]. REVIEWS OF MODERN PHYSICS, 1964, 36 (1P1) : 31 - +
  • [4] Carbon solubility and superconductivity in MgB2
    Bharathi, A
    Balaselvi, SJ
    Kalavathi, S
    Reddy, GLN
    Sastry, VS
    Hariharan, Y
    Radhakrishnan, TS
    [J]. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2002, 370 (04): : 211 - 218
  • [5] Vaporization thermodynamics of MgB2 and MgB4
    Brutti, S
    Ciccioli, A
    Balducci, G
    Gigli, G
    Manfrinetti, P
    Palenzona, A
    [J]. APPLIED PHYSICS LETTERS, 2002, 80 (16) : 2892 - 2894
  • [6] The substitutional chemistry of MgB2
    Cava, RJ
    Zandbergen, HW
    Inumaru, K
    [J]. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2003, 385 (1-2): : 8 - 15
  • [7] Ball milling induced low-temperature carbothermic reduction of ilmenite
    Chen, Y
    Hwang, T
    Williams, JS
    [J]. MATERIALS LETTERS, 1996, 28 (1-3) : 55 - 58
  • [8] Effect of carbon nanotube doping on critical current density of MgB2 superconductor
    Dou, SX
    Yeoh, WK
    Horvat, J
    Ionescu, M
    [J]. APPLIED PHYSICS LETTERS, 2003, 83 (24) : 4996 - 4998
  • [9] Modification of carbon nanostructures by high energy ball-milling under argon and hydrogen atmosphere
    Francke, M
    Hermann, H
    Wenzel, R
    Seifert, G
    Wetzig, K
    [J]. CARBON, 2005, 43 (06) : 1204 - 1212
  • [10] Upper critical field and irreversibility line in superconducting MgB2
    Fuchs, G
    Müller, KH
    Handstein, A
    Nenkov, K
    Narozhnyi, VN
    Eckert, D
    Wolf, M
    Schultz, L
    [J]. SOLID STATE COMMUNICATIONS, 2001, 118 (10) : 497 - 501
1234