Theoretical study of phase transition in type II superconductors with Pauli paramagnetic effect in high magnetic field

Hiroto Adachi; Ryusuke Ikeda

doi:10.1016/S0921-4526(02)02265-2

Theoretical study of phase transition in type II superconductors with Pauli paramagnetic effect in high magnetic field

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Abstract

High-field phase diagram of type II superconductors with paramagnetic depairing effect is examined through a theoretical argument and a numerical simulation of a Ginzburg-Landau model with a negative quartic term. Our results strongly suggest, contrary to the argument based on magnetization data in CeCoIn₅, that the first-order transition at H_c2(T) in the mean field (MF) approximation is reflected in real systems merely as a crossover and that the thermal phase diagram is similar to that in the ordinary case where the MF transition is of second order.

Original language	English
Pages (from-to)	1391-1392
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	329-333
Issue number	II
DOIs	https://doi.org/10.1016/S0921-4526(02)02265-2
Publication status	Published - May 2003
Externally published	Yes

Keywords

Paramagnetic effect
Superconducting fluctuation
Vortex

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/S0921-4526(02)02265-2

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abstract = "High-field phase diagram of type II superconductors with paramagnetic depairing effect is examined through a theoretical argument and a numerical simulation of a Ginzburg-Landau model with a negative quartic term. Our results strongly suggest, contrary to the argument based on magnetization data in CeCoIn5, that the first-order transition at Hc2(T) in the mean field (MF) approximation is reflected in real systems merely as a crossover and that the thermal phase diagram is similar to that in the ordinary case where the MF transition is of second order.",

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AU - Adachi, Hiroto

AU - Ikeda, Ryusuke

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N2 - High-field phase diagram of type II superconductors with paramagnetic depairing effect is examined through a theoretical argument and a numerical simulation of a Ginzburg-Landau model with a negative quartic term. Our results strongly suggest, contrary to the argument based on magnetization data in CeCoIn5, that the first-order transition at Hc2(T) in the mean field (MF) approximation is reflected in real systems merely as a crossover and that the thermal phase diagram is similar to that in the ordinary case where the MF transition is of second order.

AB - High-field phase diagram of type II superconductors with paramagnetic depairing effect is examined through a theoretical argument and a numerical simulation of a Ginzburg-Landau model with a negative quartic term. Our results strongly suggest, contrary to the argument based on magnetization data in CeCoIn5, that the first-order transition at Hc2(T) in the mean field (MF) approximation is reflected in real systems merely as a crossover and that the thermal phase diagram is similar to that in the ordinary case where the MF transition is of second order.

KW - Paramagnetic effect

KW - Superconducting fluctuation

KW - Vortex

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VL - 329-333

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JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - II

ER -

Theoretical study of phase transition in type II superconductors with Pauli paramagnetic effect in high magnetic field

Abstract

Keywords

ASJC Scopus subject areas

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