Anderson flux creep model and relaxation of persistent current in grain-aligned Y1Ba2Cu3O7-δ

J. Jung; I. Isaac; M. Murakami; M. A.K. Mohamed

doi:10.1016/0921-4534(94)90966-0

Anderson flux creep model and relaxation of persistent current in grain-aligned Y₁Ba₂Cu₃O_7-δ

J. Jung, I. Isaac, M. Murakami, M. A.K. Mohamed

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

4 Citations (Scopus)

Abstract

Flux-creep-induced relaxation of persistent current was investigated close to T_c in a ring-shaped grain-aligned Y₁Ba₂Cu₃O_7-σ (YBCO) with the c-axis perpendicular to the ring's plane. The results revealed two distinct relaxation regimes: a steady-state logarithmic relaxation of the persistent current from an initial value J_o ≅ J_c with the energy barrier U_eff(J) = U_o(1-J/J_c) where U_o ≅ 0.4 eV, and a non-steady-state (non-lo garithmic) one from J_o < - 0.8 J_c, with U_eff(J) = constant at fixed value of time.

Original language	English
Pages (from-to)	2879-2880
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	235-240
Issue number	PART 5
DOIs	https://doi.org/10.1016/0921-4534(94)90966-0
Publication status	Published - 1994 Dec
Externally published	Yes

ASJC Scopus subject areas

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

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10.1016/0921-4534(94)90966-0

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title = "Anderson flux creep model and relaxation of persistent current in grain-aligned Y1Ba2Cu3O7-δ",

abstract = "Flux-creep-induced relaxation of persistent current was investigated close to Tc in a ring-shaped grain-aligned Y1Ba2Cu3O7-σ (YBCO) with the c-axis perpendicular to the ring's plane. The results revealed two distinct relaxation regimes: a steady-state logarithmic relaxation of the persistent current from an initial value Jo ≅ Jc with the energy barrier Ueff(J) = Uo(1-J/Jc) where Uo ≅ 0.4 eV, and a non-steady-state (non-lo garithmic) one from Jo < - 0.8 Jc, with Ueff(J) = constant at fixed value of time.",

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AU - Jung, J.

AU - Isaac, I.

AU - Murakami, M.

AU - Mohamed, M. A.K.

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AB - Flux-creep-induced relaxation of persistent current was investigated close to Tc in a ring-shaped grain-aligned Y1Ba2Cu3O7-σ (YBCO) with the c-axis perpendicular to the ring's plane. The results revealed two distinct relaxation regimes: a steady-state logarithmic relaxation of the persistent current from an initial value Jo ≅ Jc with the energy barrier Ueff(J) = Uo(1-J/Jc) where Uo ≅ 0.4 eV, and a non-steady-state (non-lo garithmic) one from Jo < - 0.8 Jc, with Ueff(J) = constant at fixed value of time.

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Anderson flux creep model and relaxation of persistent current in grain-aligned Y₁Ba₂Cu₃O_7-δ

Abstract

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