Transport characteristics and flux dynamics in high tc superconductors under the influence of pin fluctuation

T. Kiss; T. Nakamura; M. Takeo; K. Yamafuji; F. Irie

doi:10.1109/77.620698

Transport characteristics and flux dynamics in high t_c superconductors under the influence of pin fluctuation

T. Kiss, T. Nakamura, M. Takeo, K. Yamafuji, F. Irie

Section of Measurement and Control Engineering

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

2 Citations (Scopus)

Abstract

Flux dynamics in a random pin medium have been studied with the Monte-Carlo method. It has been shown that flux depinning occurs percolatively in the disordered system and the scaling of electric field, E, vs. current density, J, curves reflects the stochastic property of the pin fluctuation. The analytical expressions for temperature and magnetic field dependent E-J curves have also been derived. The analytical expressions agreed quantitatively with the simulation and the measurements in a Y₁Ba₂Cu₃O_7-δ thin film at various temperature and magnetic field. Moreover, combining the analytical E-J relationship with Maxwell's equations, we estimated the internal current distribution for alternating bias currents.

Original language	English
Pages (from-to)	1161-1164
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	7
Issue number	2 PART 2
DOIs	https://doi.org/10.1109/77.620698
Publication status	Published - 1997

All Science Journal Classification (ASJC) codes

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

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AU - Takeo, M.

AU - Yamafuji, K.

AU - Irie, F.

PY - 1997

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N2 - Flux dynamics in a random pin medium have been studied with the Monte-Carlo method. It has been shown that flux depinning occurs percolatively in the disordered system and the scaling of electric field, E, vs. current density, J, curves reflects the stochastic property of the pin fluctuation. The analytical expressions for temperature and magnetic field dependent E-J curves have also been derived. The analytical expressions agreed quantitatively with the simulation and the measurements in a Y1Ba2Cu3O7-δ thin film at various temperature and magnetic field. Moreover, combining the analytical E-J relationship with Maxwell's equations, we estimated the internal current distribution for alternating bias currents.

AB - Flux dynamics in a random pin medium have been studied with the Monte-Carlo method. It has been shown that flux depinning occurs percolatively in the disordered system and the scaling of electric field, E, vs. current density, J, curves reflects the stochastic property of the pin fluctuation. The analytical expressions for temperature and magnetic field dependent E-J curves have also been derived. The analytical expressions agreed quantitatively with the simulation and the measurements in a Y1Ba2Cu3O7-δ thin film at various temperature and magnetic field. Moreover, combining the analytical E-J relationship with Maxwell's equations, we estimated the internal current distribution for alternating bias currents.

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Transport characteristics and flux dynamics in high t_c superconductors under the influence of pin fluctuation

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