Enhancement of the upper critical field in sub-micron carbon-doped MgB 2 by two-step reaction method

S. C. Yan; G. Yan; L. Zhou; Y. Jia; H. H. Wen; Y. F. Lu

doi:10.1088/0953-2048/20/4/012

Enhancement of the upper critical field in sub-micron carbon-doped MgB ₂ by two-step reaction method

S. C. Yan
, G. Yan
, L. Zhou
, Y. Jia
, H. H. Wen
, Y. F. Lu

材料学院

Northwestern Polytechnical University Xian
Northwest Institute for Nonferrous Metal Research
CAS - Institute of Physics

科研成果: 期刊稿件 › 文章 › 同行评审

20 引用（Scopus）

摘要

The two-step reaction method was proposed to prepare sub-micron carbon-doped MgB₂ superconductors. The sample with a nominal composition of Mg(B_0.95C_0.05)₄ was sintered at 1000 °C for 0.5h. An appropriate amount of Mg was then added to get the stoichiometry of Mg(B_0.95C_0.05)₂, which was sintered at 750 °C for 2h. The upper critical field of H_c2 for the sub-micron carbon-doped MgB₂ by a two-step reaction reached 10.5T at 20K. The critical current density J_c is 7.8 × 10 ⁴Acm^-2 at 20K and 1T. The results indicate that the two-step reaction method could effectively introduce the doping element of carbon into the MgB₂ crystalline lattice, and therefore improve the upper critical field.

源语言	英语
文章编号	012
页（从-至）	377-380
页数	4
期刊	Superconductor Science and Technology
卷	20
期	4
DOI	https://doi.org/10.1088/0953-2048/20/4/012
出版状态	已出版 - 1 4月 2007

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10.1088/0953-2048/20/4/012

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title = "Enhancement of the upper critical field in sub-micron carbon-doped MgB 2 by two-step reaction method",

abstract = "The two-step reaction method was proposed to prepare sub-micron carbon-doped MgB2 superconductors. The sample with a nominal composition of Mg(B0.95C0.05)4 was sintered at 1000 °C for 0.5h. An appropriate amount of Mg was then added to get the stoichiometry of Mg(B0.95C0.05)2, which was sintered at 750 °C for 2h. The upper critical field of Hc2 for the sub-micron carbon-doped MgB2 by a two-step reaction reached 10.5T at 20K. The critical current density Jc is 7.8 × 10 4Acm-2 at 20K and 1T. The results indicate that the two-step reaction method could effectively introduce the doping element of carbon into the MgB2 crystalline lattice, and therefore improve the upper critical field.",

author = "Yan, \{S. C.\} and G. Yan and L. Zhou and Y. Jia and Wen, \{H. H.\} and Lu, \{Y. F.\}",

year = "2007",

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doi = "10.1088/0953-2048/20/4/012",

language = "英语",

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TY - JOUR

T1 - Enhancement of the upper critical field in sub-micron carbon-doped MgB 2 by two-step reaction method

AU - Yan, S. C.

AU - Yan, G.

AU - Zhou, L.

AU - Jia, Y.

AU - Wen, H. H.

AU - Lu, Y. F.

PY - 2007/4/1

Y1 - 2007/4/1

N2 - The two-step reaction method was proposed to prepare sub-micron carbon-doped MgB2 superconductors. The sample with a nominal composition of Mg(B0.95C0.05)4 was sintered at 1000 °C for 0.5h. An appropriate amount of Mg was then added to get the stoichiometry of Mg(B0.95C0.05)2, which was sintered at 750 °C for 2h. The upper critical field of Hc2 for the sub-micron carbon-doped MgB2 by a two-step reaction reached 10.5T at 20K. The critical current density Jc is 7.8 × 10 4Acm-2 at 20K and 1T. The results indicate that the two-step reaction method could effectively introduce the doping element of carbon into the MgB2 crystalline lattice, and therefore improve the upper critical field.

AB - The two-step reaction method was proposed to prepare sub-micron carbon-doped MgB2 superconductors. The sample with a nominal composition of Mg(B0.95C0.05)4 was sintered at 1000 °C for 0.5h. An appropriate amount of Mg was then added to get the stoichiometry of Mg(B0.95C0.05)2, which was sintered at 750 °C for 2h. The upper critical field of Hc2 for the sub-micron carbon-doped MgB2 by a two-step reaction reached 10.5T at 20K. The critical current density Jc is 7.8 × 10 4Acm-2 at 20K and 1T. The results indicate that the two-step reaction method could effectively introduce the doping element of carbon into the MgB2 crystalline lattice, and therefore improve the upper critical field.

UR - https://www.scopus.com/pages/publications/34249043623

U2 - 10.1088/0953-2048/20/4/012

DO - 10.1088/0953-2048/20/4/012

M3 - 文章

AN - SCOPUS:34249043623

SN - 0953-2048

VL - 20

SP - 377

EP - 380

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

IS - 4

M1 - 012

ER -

Enhancement of the upper critical field in sub-micron carbon-doped MgB 2 by two-step reaction method

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Enhancement of the upper critical field in sub-micron carbon-doped MgB ₂ by two-step reaction method