Flux creep by quantum tunneling in YBa2Cu3O7-δ

S. Uji; H. Aoki; S. Takebayashi; M. Tanaka; M. Hashimoto

doi:10.1016/0921-4534(93)90429-T

Flux creep by quantum tunneling in YBa₂Cu₃O_7-δ

S. Uji, H. Aoki, S. Takebayashi, M. Tanaka, M. Hashimoto

Science

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21 Citations (Scopus)

Abstract

Flux creep measurements in the critical state for c-axis oriented YBa₂Cu₃O_7-δ samples have been carried out in the temperature range between 0.06 and 20 K. The normalized relaxation rate of the remanent magnetization decreases with decreasing temperature below 20 K and becomes constant with the value of about 0.01 below 1 K. The relaxation rates are independent of the direction of the applied magnetic field below 4 K at least. These results are in good agreement with the prediction by quantum collective creep theory. The crossover from the quantum tunneling process to the thermal activation process of the vortex motion is observed at 3 K.

Original language	English
Pages (from-to)	112-118
Number of pages	7
Journal	Physica C: Superconductivity and its applications
Volume	207
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(93)90429-T
Publication status	Published - 1993 Mar 1

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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abstract = "Flux creep measurements in the critical state for c-axis oriented YBa2Cu3O7-δ samples have been carried out in the temperature range between 0.06 and 20 K. The normalized relaxation rate of the remanent magnetization decreases with decreasing temperature below 20 K and becomes constant with the value of about 0.01 below 1 K. The relaxation rates are independent of the direction of the applied magnetic field below 4 K at least. These results are in good agreement with the prediction by quantum collective creep theory. The crossover from the quantum tunneling process to the thermal activation process of the vortex motion is observed at 3 K.",

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T1 - Flux creep by quantum tunneling in YBa2Cu3O7-δ

AU - Uji, S.

AU - Aoki, H.

AU - Takebayashi, S.

AU - Tanaka, M.

AU - Hashimoto, M.

PY - 1993/3/1

Y1 - 1993/3/1

N2 - Flux creep measurements in the critical state for c-axis oriented YBa2Cu3O7-δ samples have been carried out in the temperature range between 0.06 and 20 K. The normalized relaxation rate of the remanent magnetization decreases with decreasing temperature below 20 K and becomes constant with the value of about 0.01 below 1 K. The relaxation rates are independent of the direction of the applied magnetic field below 4 K at least. These results are in good agreement with the prediction by quantum collective creep theory. The crossover from the quantum tunneling process to the thermal activation process of the vortex motion is observed at 3 K.

AB - Flux creep measurements in the critical state for c-axis oriented YBa2Cu3O7-δ samples have been carried out in the temperature range between 0.06 and 20 K. The normalized relaxation rate of the remanent magnetization decreases with decreasing temperature below 20 K and becomes constant with the value of about 0.01 below 1 K. The relaxation rates are independent of the direction of the applied magnetic field below 4 K at least. These results are in good agreement with the prediction by quantum collective creep theory. The crossover from the quantum tunneling process to the thermal activation process of the vortex motion is observed at 3 K.

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Flux creep by quantum tunneling in YBa₂Cu₃O_7-δ

Abstract

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