Flux motion by quantum tunnelling in high- Tc superconductors

D. Fiorani; A. Garcia; X. X. Zhang; A. M. Testa; J. Tejada

doi:10.1007/BF02462195

Flux motion by quantum tunnelling in high- T_c superconductors

D. Fiorani^*, A. Garcia, X. X. Zhang, A. M. Testa, J. Tejada

^*Corresponding author for this work

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

Abstract

The results of low-temperature magnetic-relaxation experiments in TlBaCaCuO superconductors (2212 and 2223 phase) are reported. They give evidence of a crossover from a thermally activated regime of flux motion to a nonthermally activated one. The magnetic-relaxation rate is found to become temperature independent below ≅7K and ≅3K, for the 2212 and 2223 phase, respectively. Its value compares well with that predicted by the theories of flux motion by quantum tunnelling.

Original language	English (US)
Pages (from-to)	1925-1932
Number of pages	8
Journal	Il Nuovo Cimento D
Volume	16
Issue number	10
DOIs	https://doi.org/10.1007/BF02462195
State	Published - Oct 1994
Externally published	Yes

Keywords

01.30.Cc
74.60.Ge
74.60.Jg
Conference proceedings
Critical currents
Flux pinning
flux motion
fluxon-defect interactions

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1007/BF02462195

Cite this

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title = "Flux motion by quantum tunnelling in high- Tc superconductors",

abstract = "The results of low-temperature magnetic-relaxation experiments in TlBaCaCuO superconductors (2212 and 2223 phase) are reported. They give evidence of a crossover from a thermally activated regime of flux motion to a nonthermally activated one. The magnetic-relaxation rate is found to become temperature independent below ≅7K and ≅3K, for the 2212 and 2223 phase, respectively. Its value compares well with that predicted by the theories of flux motion by quantum tunnelling.",

keywords = "01.30.Cc, 74.60.Ge, 74.60.Jg, Conference proceedings, Critical currents, Flux pinning, flux motion, fluxon-defect interactions",

author = "D. Fiorani and A. Garcia and Zhang, {X. X.} and Testa, {A. M.} and J. Tejada",

year = "1994",

month = oct,

doi = "10.1007/BF02462195",

language = "English (US)",

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pages = "1925--1932",

journal = "Il Nuovo Cimento D",

issn = "0392-6737",

publisher = "Italian Physical Society",

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T1 - Flux motion by quantum tunnelling in high- Tc superconductors

AU - Fiorani, D.

AU - Garcia, A.

AU - Zhang, X. X.

AU - Testa, A. M.

AU - Tejada, J.

PY - 1994/10

Y1 - 1994/10

N2 - The results of low-temperature magnetic-relaxation experiments in TlBaCaCuO superconductors (2212 and 2223 phase) are reported. They give evidence of a crossover from a thermally activated regime of flux motion to a nonthermally activated one. The magnetic-relaxation rate is found to become temperature independent below ≅7K and ≅3K, for the 2212 and 2223 phase, respectively. Its value compares well with that predicted by the theories of flux motion by quantum tunnelling.

AB - The results of low-temperature magnetic-relaxation experiments in TlBaCaCuO superconductors (2212 and 2223 phase) are reported. They give evidence of a crossover from a thermally activated regime of flux motion to a nonthermally activated one. The magnetic-relaxation rate is found to become temperature independent below ≅7K and ≅3K, for the 2212 and 2223 phase, respectively. Its value compares well with that predicted by the theories of flux motion by quantum tunnelling.

KW - 01.30.Cc

KW - 74.60.Ge

KW - 74.60.Jg

KW - Conference proceedings

KW - Critical currents

KW - Flux pinning

KW - flux motion

KW - fluxon-defect interactions

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DO - 10.1007/BF02462195

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