First-order transition switch-off of superconductivity in UGe2

N. Kabeya; R. Iijima; E. Osaki; S. Ban; K. Imura; K. Deguchi; N. Aso; Y. Homma; Y. Shiokawa; N. K. Sato

doi:10.1016/j.physb.2009.07.082

First-order transition switch-off of superconductivity in UGe₂

N. Kabeya, R. Iijima, E. Osaki, S. Ban, K. Imura, K. Deguchi, N. Aso, Y. Homma, Y. Shiokawa, N. K. Sato

Materials Processing and Characterization Division

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

6 Citations (Scopus)

Abstract

The ac magnetic susceptibility, the thermal expansion and the magnetostriction were measured using a single crystalline sample of UGe₂ under pressure. We find that as the field exceeds a transition field, where the system transforms from a high pressure phase (P > P_X) into a low pressure phase (P < P_X), the superconductivity steeply collapses within a transient region arising from the pressure inhomogeneity. We also estimate an accurate value of P_X in zero temperature limit and a pressure distribution around it. Using thus estimated quantity, we argue that the superconductivity (in zero magnetic field) below the critical pressure is not intrinsic but extrinsic due to the pressure inhomogeneity.

Original language	English
Pages (from-to)	3238-3241
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	404
Issue number	19
DOIs	https://doi.org/10.1016/j.physb.2009.07.082
Publication status	Published - 2009 Oct 15

Keywords

Ac magnetic susceptibility
Ferromagnetism
First-order transition
Magnetostriction
Superconductivity
Thermal expansion
UGe

ASJC Scopus subject areas

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

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10.1016/j.physb.2009.07.082

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title = "First-order transition switch-off of superconductivity in UGe2",

abstract = "The ac magnetic susceptibility, the thermal expansion and the magnetostriction were measured using a single crystalline sample of UGe2 under pressure. We find that as the field exceeds a transition field, where the system transforms from a high pressure phase (P > PX) into a low pressure phase (P < PX), the superconductivity steeply collapses within a transient region arising from the pressure inhomogeneity. We also estimate an accurate value of PX in zero temperature limit and a pressure distribution around it. Using thus estimated quantity, we argue that the superconductivity (in zero magnetic field) below the critical pressure is not intrinsic but extrinsic due to the pressure inhomogeneity.",

keywords = "Ac magnetic susceptibility, Ferromagnetism, First-order transition, Magnetostriction, Superconductivity, Thermal expansion, UGe",

author = "N. Kabeya and R. Iijima and E. Osaki and S. Ban and K. Imura and K. Deguchi and N. Aso and Y. Homma and Y. Shiokawa and Sato, {N. K.}",

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AU - Kabeya, N.

AU - Iijima, R.

AU - Osaki, E.

AU - Ban, S.

AU - Imura, K.

AU - Deguchi, K.

AU - Aso, N.

AU - Homma, Y.

AU - Shiokawa, Y.

AU - Sato, N. K.

PY - 2009/10/15

Y1 - 2009/10/15

N2 - The ac magnetic susceptibility, the thermal expansion and the magnetostriction were measured using a single crystalline sample of UGe2 under pressure. We find that as the field exceeds a transition field, where the system transforms from a high pressure phase (P > PX) into a low pressure phase (P < PX), the superconductivity steeply collapses within a transient region arising from the pressure inhomogeneity. We also estimate an accurate value of PX in zero temperature limit and a pressure distribution around it. Using thus estimated quantity, we argue that the superconductivity (in zero magnetic field) below the critical pressure is not intrinsic but extrinsic due to the pressure inhomogeneity.

AB - The ac magnetic susceptibility, the thermal expansion and the magnetostriction were measured using a single crystalline sample of UGe2 under pressure. We find that as the field exceeds a transition field, where the system transforms from a high pressure phase (P > PX) into a low pressure phase (P < PX), the superconductivity steeply collapses within a transient region arising from the pressure inhomogeneity. We also estimate an accurate value of PX in zero temperature limit and a pressure distribution around it. Using thus estimated quantity, we argue that the superconductivity (in zero magnetic field) below the critical pressure is not intrinsic but extrinsic due to the pressure inhomogeneity.

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KW - Ferromagnetism

KW - First-order transition

KW - Magnetostriction

KW - Superconductivity

KW - Thermal expansion

KW - UGe

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