Dynamical behavior of vortices introduced into a layered superconductor κ-(BEDT-TTF)2Cu(NCS)2

Shigeru Kasahara; Yutaka Nishio; Koji Kajita

doi:10.1016/S0379-6779(00)01155-3

Dynamical behavior of vortices introduced into a layered superconductor κ-(BEDT-TTF)₂Cu(NCS)₂

Shigeru Kasahara, Yutaka Nishio, Koji Kajita

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

1 Citation (Scopus)

Abstract

Vortices penetrating κ-(BEDT-TTF)₂Cu(NCS)₂ are interesting for its strongly two dimensional character. We investigated the behavior of vortices introduced by a dc-magnetic field through the shielding effect of the ac-magnetic field. For moderately strong ac-fields, we found an anomalous peak in the dc-field dependence of the shielding effect. The temperature dependence of the peak position is expressed as H_p = H₀(Tc/T - 1). It turned out that the peak appears at the dc-field where the effective pinning potential on vortices has its maximum. We have confirmed this by estimating the pinning potential from the relaxation of the shielding, effect, which is caused by thermal creep of vortices and depends logarithmically on time.

Original language	English
Pages (from-to)	937-938
Number of pages	2
Journal	Synthetic Metals
Volume	120
Issue number	1-3
DOIs	https://doi.org/10.1016/S0379-6779(00)01155-3
Publication status	Published - Mar 15 2001
Externally published	Yes

Keywords

Magnetic measurements
Organic superconductors

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/S0379-6779(00)01155-3

Cite this

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title = "Dynamical behavior of vortices introduced into a layered superconductor κ-(BEDT-TTF)2Cu(NCS)2",

abstract = "Vortices penetrating κ-(BEDT-TTF)2Cu(NCS)2 are interesting for its strongly two dimensional character. We investigated the behavior of vortices introduced by a dc-magnetic field through the shielding effect of the ac-magnetic field. For moderately strong ac-fields, we found an anomalous peak in the dc-field dependence of the shielding effect. The temperature dependence of the peak position is expressed as Hp = H0(Tc/T - 1). It turned out that the peak appears at the dc-field where the effective pinning potential on vortices has its maximum. We have confirmed this by estimating the pinning potential from the relaxation of the shielding, effect, which is caused by thermal creep of vortices and depends logarithmically on time.",

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T1 - Dynamical behavior of vortices introduced into a layered superconductor κ-(BEDT-TTF)2Cu(NCS)2

AU - Kasahara, Shigeru

AU - Nishio, Yutaka

AU - Kajita, Koji

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N2 - Vortices penetrating κ-(BEDT-TTF)2Cu(NCS)2 are interesting for its strongly two dimensional character. We investigated the behavior of vortices introduced by a dc-magnetic field through the shielding effect of the ac-magnetic field. For moderately strong ac-fields, we found an anomalous peak in the dc-field dependence of the shielding effect. The temperature dependence of the peak position is expressed as Hp = H0(Tc/T - 1). It turned out that the peak appears at the dc-field where the effective pinning potential on vortices has its maximum. We have confirmed this by estimating the pinning potential from the relaxation of the shielding, effect, which is caused by thermal creep of vortices and depends logarithmically on time.

AB - Vortices penetrating κ-(BEDT-TTF)2Cu(NCS)2 are interesting for its strongly two dimensional character. We investigated the behavior of vortices introduced by a dc-magnetic field through the shielding effect of the ac-magnetic field. For moderately strong ac-fields, we found an anomalous peak in the dc-field dependence of the shielding effect. The temperature dependence of the peak position is expressed as Hp = H0(Tc/T - 1). It turned out that the peak appears at the dc-field where the effective pinning potential on vortices has its maximum. We have confirmed this by estimating the pinning potential from the relaxation of the shielding, effect, which is caused by thermal creep of vortices and depends logarithmically on time.

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