Determination of the upper critical magnetic fields from fluctuation conductivity

J. Kačmarčík; P. Samuely; P. Szabó; T. Klein

doi:10.1016/j.physc.2004.07.015

Determination of the upper critical magnetic fields from fluctuation conductivity

J. Kačmarčík, P. Samuely, P. Szabó, T. Klein

Research output: Contribution to journal › Article › peer-review

Abstract

The effect of fluctuations on the resistive transitions in magnetic field is analyzed in the frame work of the scaling procedure obtained theoretically by Ullah and Dorsey in two types of superconductors: in the cubic perovskite oxide Ba_1-xK_xBiO₃ with a relatively high T _c ∼ 23 K and in the low-T_c but quasi two-dimensional misfit-layer compound (LaSe)_1.14(NbSe₂). In both cases the scaling is applicable in a significant range of magnetic fields around H_c2. The temperature dependence of the upper critical magnetic fields H_c2 determined from this analysis reveals a classical form for the type-II superconductor in contrast to a direct determination of H _c2(T) from the resistive transitions but in a good agreement with independent determination by the non-dissipative methods.

Original language	English
Pages (from-to)	15-20
Number of pages	6
Journal	Physica C: Superconductivity and its Applications
Volume	415
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physc.2004.07.015
Publication status	Published - 1 Oct 2004
Externally published	Yes

Keywords

Superconducting fluctuations
Transport properties
Upper critical fields

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10.1016/j.physc.2004.07.015

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title = "Determination of the upper critical magnetic fields from fluctuation conductivity",

abstract = "The effect of fluctuations on the resistive transitions in magnetic field is analyzed in the frame work of the scaling procedure obtained theoretically by Ullah and Dorsey in two types of superconductors: in the cubic perovskite oxide Ba1-xKxBiO3 with a relatively high T c ∼ 23 K and in the low-Tc but quasi two-dimensional misfit-layer compound (LaSe)1.14(NbSe2). In both cases the scaling is applicable in a significant range of magnetic fields around Hc2. The temperature dependence of the upper critical magnetic fields Hc2 determined from this analysis reveals a classical form for the type-II superconductor in contrast to a direct determination of H c2(T) from the resistive transitions but in a good agreement with independent determination by the non-dissipative methods.",

keywords = "Superconducting fluctuations, Transport properties, Upper critical fields",

author = "J. Ka{\v c}mar{\v c}{\'i}k and P. Samuely and P. Szab{\'o} and T. Klein",

year = "2004",

month = oct,

day = "1",

doi = "10.1016/j.physc.2004.07.015",

language = "English",

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

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TY - JOUR

T1 - Determination of the upper critical magnetic fields from fluctuation conductivity

AU - Kačmarčík, J.

AU - Samuely, P.

AU - Szabó, P.

AU - Klein, T.

PY - 2004/10/1

Y1 - 2004/10/1

N2 - The effect of fluctuations on the resistive transitions in magnetic field is analyzed in the frame work of the scaling procedure obtained theoretically by Ullah and Dorsey in two types of superconductors: in the cubic perovskite oxide Ba1-xKxBiO3 with a relatively high T c ∼ 23 K and in the low-Tc but quasi two-dimensional misfit-layer compound (LaSe)1.14(NbSe2). In both cases the scaling is applicable in a significant range of magnetic fields around Hc2. The temperature dependence of the upper critical magnetic fields Hc2 determined from this analysis reveals a classical form for the type-II superconductor in contrast to a direct determination of H c2(T) from the resistive transitions but in a good agreement with independent determination by the non-dissipative methods.

AB - The effect of fluctuations on the resistive transitions in magnetic field is analyzed in the frame work of the scaling procedure obtained theoretically by Ullah and Dorsey in two types of superconductors: in the cubic perovskite oxide Ba1-xKxBiO3 with a relatively high T c ∼ 23 K and in the low-Tc but quasi two-dimensional misfit-layer compound (LaSe)1.14(NbSe2). In both cases the scaling is applicable in a significant range of magnetic fields around Hc2. The temperature dependence of the upper critical magnetic fields Hc2 determined from this analysis reveals a classical form for the type-II superconductor in contrast to a direct determination of H c2(T) from the resistive transitions but in a good agreement with independent determination by the non-dissipative methods.

KW - Superconducting fluctuations

KW - Transport properties

KW - Upper critical fields

U2 - 10.1016/j.physc.2004.07.015

DO - 10.1016/j.physc.2004.07.015

M3 - Article

AN - SCOPUS:4644313514

SN - 0921-4534

VL - 415

SP - 15

EP - 20

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 1-2

ER -

Determination of the upper critical magnetic fields from fluctuation conductivity

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Keywords

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