Flux pinning property in a single crystal NdBa2Cu 3Oy superconductor

M. N. Hasan; T. Kurokawa; M. Kiuchi; E. S. Otabe; T. Matsushita; N. Chikumoto; T. MacHi; M. Muralidhar; M. Murakami

doi:10.1016/j.physc.2005.01.024

Flux pinning property in a single crystal NdBa₂Cu ₃O_y superconductor

M. N. Hasan, T. Kurokawa, M. Kiuchi, E. S. Otabe, T. Matsushita, N. Chikumoto, T. MacHi, M. Muralidhar, M. Murakami

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

2 Citations (Scopus)

Abstract

The critical current density J_c and the apparent pinning potential U₀ * in a single crystal NdBa₂Cu ₃O_y superconductor which shows a broad peak effect are investigated by measuring a DC magnetization and its relaxation. The field-induced pinning mechanism does not explain the temperature dependence of peak field B_p and dip field B_d. The experimental results of J_c and U₀* are compared with the theoretical analysis based on the flux creep-flow model, taking the distribution of the flux pinning strength into account. The number of flux lines in the flux bundle (g²), the most probable value of pinning strength (A_m) and distribution width (σ²) are determined so that a good fit is obtained between the experimental and theoretical results. The behavior of these parameters is discussed in correspondence to the disorder transition of flux lines.

Original language	English
Pages (from-to)	295-299
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	426-431
Issue number	I
DOIs	https://doi.org/10.1016/j.physc.2005.01.024
Publication status	Published - 2005 Oct 1
Event	Proceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity - Duration: 2004 Nov 23 → 2004 Nov 25

Keywords

Disorder transition of flux lines
Field-induced pinning
Flux creep-flow model
NdBaCuO superconductor
Peak effect

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/j.physc.2005.01.024

Cite this

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title = "Flux pinning property in a single crystal NdBa2Cu 3Oy superconductor",

abstract = "The critical current density Jc and the apparent pinning potential U0 * in a single crystal NdBa2Cu 3Oy superconductor which shows a broad peak effect are investigated by measuring a DC magnetization and its relaxation. The field-induced pinning mechanism does not explain the temperature dependence of peak field Bp and dip field Bd. The experimental results of Jc and U0* are compared with the theoretical analysis based on the flux creep-flow model, taking the distribution of the flux pinning strength into account. The number of flux lines in the flux bundle (g2), the most probable value of pinning strength (Am) and distribution width (σ2) are determined so that a good fit is obtained between the experimental and theoretical results. The behavior of these parameters is discussed in correspondence to the disorder transition of flux lines.",

keywords = "Disorder transition of flux lines, Field-induced pinning, Flux creep-flow model, NdBaCuO superconductor, Peak effect",

author = "Hasan, {M. N.} and T. Kurokawa and M. Kiuchi and Otabe, {E. S.} and T. Matsushita and N. Chikumoto and T. MacHi and M. Muralidhar and M. Murakami",

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

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T1 - Flux pinning property in a single crystal NdBa2Cu 3Oy superconductor

AU - Hasan, M. N.

AU - Kurokawa, T.

AU - Kiuchi, M.

AU - Otabe, E. S.

AU - Matsushita, T.

AU - Chikumoto, N.

AU - MacHi, T.

AU - Muralidhar, M.

AU - Murakami, M.

PY - 2005/10/1

Y1 - 2005/10/1

N2 - The critical current density Jc and the apparent pinning potential U0 * in a single crystal NdBa2Cu 3Oy superconductor which shows a broad peak effect are investigated by measuring a DC magnetization and its relaxation. The field-induced pinning mechanism does not explain the temperature dependence of peak field Bp and dip field Bd. The experimental results of Jc and U0* are compared with the theoretical analysis based on the flux creep-flow model, taking the distribution of the flux pinning strength into account. The number of flux lines in the flux bundle (g2), the most probable value of pinning strength (Am) and distribution width (σ2) are determined so that a good fit is obtained between the experimental and theoretical results. The behavior of these parameters is discussed in correspondence to the disorder transition of flux lines.

AB - The critical current density Jc and the apparent pinning potential U0 * in a single crystal NdBa2Cu 3Oy superconductor which shows a broad peak effect are investigated by measuring a DC magnetization and its relaxation. The field-induced pinning mechanism does not explain the temperature dependence of peak field Bp and dip field Bd. The experimental results of Jc and U0* are compared with the theoretical analysis based on the flux creep-flow model, taking the distribution of the flux pinning strength into account. The number of flux lines in the flux bundle (g2), the most probable value of pinning strength (Am) and distribution width (σ2) are determined so that a good fit is obtained between the experimental and theoretical results. The behavior of these parameters is discussed in correspondence to the disorder transition of flux lines.

KW - Disorder transition of flux lines

KW - Field-induced pinning

KW - Flux creep-flow model

KW - NdBaCuO superconductor

KW - Peak effect

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