Superconducting properties of polycrystalline MgB2 superconductors fabricated by spark plasma sintering

K. J. Song; C. Park; S. W. Kim; R. K. Ko; H. S. Ha; H. S. Kim; S. S. Oh; Y. K. Kwon; S. H. Moon; S. I. Yoo

doi:10.1016/j.physc.2005.05.022

Superconducting properties of polycrystalline MgB₂ superconductors fabricated by spark plasma sintering

K. J. Song^*
, C. Park
, S. W. Kim
, R. K. Ko
, H. S. Ha
, H. S. Kim
, S. S. Oh
, Y. K. Kwon
, S. H. Moon
, S. I. Yoo

^*Corresponding author for this work

Physics Education

Korea Electrotechnology Research Institute
Seoul National University

Research output: Contribution to journal › Conference article › peer-review

16 Scopus citations

Abstract

We report the upper critical field (H_c2), the irreversibility field (H_irr), and the lower critical field (H_c1) of a dense polycrystalline MgB₂ superconductor which was prepared by the spark plasma sintering (SPS). The isothermal magnetizations M(H) of MgB ₂ sample was measured at temperatures between 5 and 50 K in fields up to 8 T. The H_c2(T) data were well fitted to the BCS-type function H_c2(T) = H_c2(0)[1 - (T/T_c)^α] ^β, with H_c2(0) = 8.5 T, α = 1.60 and β = 1.15. The H_irr (melting line) could be described by the power-law relation H_irr(T) = H_irr(0)[1 - (T/T_c)] ⁿ with n = 1.10 and H_irr(0) = 8.1 T. The deduced values of H_c1 approximately followed a linear temperature dependence, not following a parabolic dependence of H_c1(T) = H_c1(0)[1 - (T/T_c)²].

Original language	English
Pages (from-to)	588-593
Number of pages	6
Journal	Physica C: Superconductivity and its Applications
Volume	426-431
Issue number	I
DOIs	https://doi.org/10.1016/j.physc.2005.05.022
State	Published - 2005.10.1
Event	Proceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity - Duration: 2004.11.23 → 2004.11.25

Keywords

Magnetic properties
MgB superconductor
Spark plasma sintering

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10.1016/j.physc.2005.05.022

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@article{1f1c4e155d0f4723afb581e6ab3fd4a1,

title = "Superconducting properties of polycrystalline MgB2 superconductors fabricated by spark plasma sintering",

abstract = "We report the upper critical field (Hc2), the irreversibility field (Hirr), and the lower critical field (Hc1) of a dense polycrystalline MgB2 superconductor which was prepared by the spark plasma sintering (SPS). The isothermal magnetizations M(H) of MgB 2 sample was measured at temperatures between 5 and 50 K in fields up to 8 T. The Hc2(T) data were well fitted to the BCS-type function Hc2(T) = Hc2(0)[1 - (T/Tc)α] β, with Hc2(0) = 8.5 T, α = 1.60 and β = 1.15. The Hirr (melting line) could be described by the power-law relation Hirr(T) = Hirr(0)[1 - (T/Tc)] n with n = 1.10 and Hirr(0) = 8.1 T. The deduced values of Hc1 approximately followed a linear temperature dependence, not following a parabolic dependence of Hc1(T) = Hc1(0)[1 - (T/Tc)2].",

keywords = "Magnetic properties, MgB superconductor, Spark plasma sintering",

author = "Song, \{K. J.\} and C. Park and Kim, \{S. W.\} and Ko, \{R. K.\} and Ha, \{H. S.\} and Kim, \{H. S.\} and Oh, \{S. S.\} and Kwon, \{Y. K.\} and Moon, \{S. H.\} and Yoo, \{S. I.\}",

year = "2005",

month = oct,

day = "1",

doi = "10.1016/j.physc.2005.05.022",

language = "English",

volume = "426-431",

pages = "588--593",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

number = "I",

note = "Proceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity ; Conference date: 23-11-2004 Through 25-11-2004",

}

TY - JOUR

T1 - Superconducting properties of polycrystalline MgB2 superconductors fabricated by spark plasma sintering

AU - Song, K. J.

AU - Park, C.

AU - Kim, S. W.

AU - Ko, R. K.

AU - Ha, H. S.

AU - Kim, H. S.

AU - Oh, S. S.

AU - Kwon, Y. K.

AU - Moon, S. H.

AU - Yoo, S. I.

PY - 2005/10/1

Y1 - 2005/10/1

N2 - We report the upper critical field (Hc2), the irreversibility field (Hirr), and the lower critical field (Hc1) of a dense polycrystalline MgB2 superconductor which was prepared by the spark plasma sintering (SPS). The isothermal magnetizations M(H) of MgB 2 sample was measured at temperatures between 5 and 50 K in fields up to 8 T. The Hc2(T) data were well fitted to the BCS-type function Hc2(T) = Hc2(0)[1 - (T/Tc)α] β, with Hc2(0) = 8.5 T, α = 1.60 and β = 1.15. The Hirr (melting line) could be described by the power-law relation Hirr(T) = Hirr(0)[1 - (T/Tc)] n with n = 1.10 and Hirr(0) = 8.1 T. The deduced values of Hc1 approximately followed a linear temperature dependence, not following a parabolic dependence of Hc1(T) = Hc1(0)[1 - (T/Tc)2].

AB - We report the upper critical field (Hc2), the irreversibility field (Hirr), and the lower critical field (Hc1) of a dense polycrystalline MgB2 superconductor which was prepared by the spark plasma sintering (SPS). The isothermal magnetizations M(H) of MgB 2 sample was measured at temperatures between 5 and 50 K in fields up to 8 T. The Hc2(T) data were well fitted to the BCS-type function Hc2(T) = Hc2(0)[1 - (T/Tc)α] β, with Hc2(0) = 8.5 T, α = 1.60 and β = 1.15. The Hirr (melting line) could be described by the power-law relation Hirr(T) = Hirr(0)[1 - (T/Tc)] n with n = 1.10 and Hirr(0) = 8.1 T. The deduced values of Hc1 approximately followed a linear temperature dependence, not following a parabolic dependence of Hc1(T) = Hc1(0)[1 - (T/Tc)2].

KW - Magnetic properties

KW - MgB superconductor

KW - Spark plasma sintering

UR - https://www.scopus.com/pages/publications/25444516212

U2 - 10.1016/j.physc.2005.05.022

DO - 10.1016/j.physc.2005.05.022

M3 - Conference article

AN - SCOPUS:25444516212

SN - 0921-4534

VL - 426-431

SP - 588

EP - 593

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - I

T2 - Proceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity

Y2 - 23 November 2004 through 25 November 2004

ER -

Superconducting properties of polycrystalline MgB₂ superconductors fabricated by spark plasma sintering

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Keywords

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