Superconducting phase diagram of single crystal MgB2

U. Welp; A. Rydh; G. Karapetrov; W. K. Kwok; G. W. Crabtree; Ch Marcenat; L. Paulius; T. Klein; J. Marcus; K. H.P. Kim; C. U. Jung; H. S. Lee; B. Kang; S. I. Lee

doi:10.1016/S0921-4534(03)00659-2

Superconducting phase diagram of single crystal MgB₂

U. Welp
, A. Rydh
, G. Karapetrov
, W. K. Kwok
, G. W. Crabtree
, Ch Marcenat
, L. Paulius
, T. Klein
, J. Marcus
, K. H.P. Kim
, C. U. Jung
, H. S. Lee
, B. Kang
, S. I. Lee

Materials Science Division
Argonne National Laboratory
Dept. Rech. sur Fond. Matiere Cond.
Univ. Joseph Fourier-Grenoble 1
Institut NÉEL
Lab. d'Etud. des Proprietes Solides
NCRICS
Pohang University of Science and Technology

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

4 Citations (Scopus)

Abstract

Using magnetization, transport and single-crystal specific heat measurements we have determined the superconducting phase diagram of MgB₂. A zero-temperature in-plane coherence length of 9.4 nm is found. The superconducting anisotropy γ changes monotonously from a value around 2 near T_c to above 4.5 near 22 K. We present strong evidence for a surface superconducting state for H∥c which might account for the wide spread in reported values of the superconducting anisotropy.

Original language	English
Pages (from-to)	137-142
Number of pages	6
Journal	Physica C: Superconductivity and its Applications
Volume	387
Issue number	1-2
DOIs	https://doi.org/10.1016/S0921-4534(03)00659-2
Publication status	Published - 1 May 2003
Externally published	Yes
Event	Proceedings of the Polish - US Workshop - Ladek Zdroj, Poland Duration: 14 Jul 2002 → 16 Jul 2002

Keywords

MgB
Single crystal
Surface superconductivity
Upper critical field

Access to Document

10.1016/S0921-4534(03)00659-2

Cite this

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title = "Superconducting phase diagram of single crystal MgB2",

abstract = "Using magnetization, transport and single-crystal specific heat measurements we have determined the superconducting phase diagram of MgB2. A zero-temperature in-plane coherence length of 9.4 nm is found. The superconducting anisotropy γ changes monotonously from a value around 2 near Tc to above 4.5 near 22 K. We present strong evidence for a surface superconducting state for H∥c which might account for the wide spread in reported values of the superconducting anisotropy.",

keywords = "MgB, Single crystal, Surface superconductivity, Upper critical field",

author = "U. Welp and A. Rydh and G. Karapetrov and Kwok, \{W. K.\} and Crabtree, \{G. W.\} and Ch Marcenat and L. Paulius and T. Klein and J. Marcus and Kim, \{K. H.P.\} and Jung, \{C. U.\} and Lee, \{H. S.\} and B. Kang and Lee, \{S. I.\}",

year = "2003",

month = may,

day = "1",

doi = "10.1016/S0921-4534(03)00659-2",

language = "English",

volume = "387",

pages = "137--142",

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

issn = "0921-4534",

publisher = "Elsevier B.V.",

number = "1-2",

note = "Proceedings of the Polish - US Workshop ; Conference date: 14-07-2002 Through 16-07-2002",

}

TY - JOUR

T1 - Superconducting phase diagram of single crystal MgB2

AU - Welp, U.

AU - Rydh, A.

AU - Karapetrov, G.

AU - Kwok, W. K.

AU - Crabtree, G. W.

AU - Marcenat, Ch

AU - Paulius, L.

AU - Klein, T.

AU - Marcus, J.

AU - Kim, K. H.P.

AU - Jung, C. U.

AU - Lee, H. S.

AU - Kang, B.

AU - Lee, S. I.

PY - 2003/5/1

Y1 - 2003/5/1

N2 - Using magnetization, transport and single-crystal specific heat measurements we have determined the superconducting phase diagram of MgB2. A zero-temperature in-plane coherence length of 9.4 nm is found. The superconducting anisotropy γ changes monotonously from a value around 2 near Tc to above 4.5 near 22 K. We present strong evidence for a surface superconducting state for H∥c which might account for the wide spread in reported values of the superconducting anisotropy.

AB - Using magnetization, transport and single-crystal specific heat measurements we have determined the superconducting phase diagram of MgB2. A zero-temperature in-plane coherence length of 9.4 nm is found. The superconducting anisotropy γ changes monotonously from a value around 2 near Tc to above 4.5 near 22 K. We present strong evidence for a surface superconducting state for H∥c which might account for the wide spread in reported values of the superconducting anisotropy.

KW - MgB

KW - Single crystal

KW - Surface superconductivity

KW - Upper critical field

U2 - 10.1016/S0921-4534(03)00659-2

DO - 10.1016/S0921-4534(03)00659-2

M3 - Conference article

AN - SCOPUS:0037401284

SN - 0921-4534

VL - 387

SP - 137

EP - 142

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 1-2

T2 - Proceedings of the Polish - US Workshop

Y2 - 14 July 2002 through 16 July 2002