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Title: Thermally activated flux avalanches in single crystals of high-[ital T][sub [ital c]] superconductors

Abstract

We have experimentally investigated long-time ([gt]10 h) magnetic relaxation in single crystals of Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub [ital x]] and YBa[sub 2]Cu[sub 8]O[sub [ital x]] at wide ranges of temperature and field. We have found that the flux motion in single crystals of high-[ital T][sub [ital c]] superconductors exhibits two distinctly different behaviors at a wide regime of driving force. At large driving force, the flux motion is dominated by thermally activated avalanches, which can be described by a so-called self-organized criticality theory. At small driving force, however, the avalanche effect is significantly reduced, and the flux motion is characterized by slow creep which can be described by the Anderson-Kim model. Therefore, there is a dynamic crossover between the flux avalanches and a pure thermally activated regime in high-[ital T][sub [ital c]] superconductors.

Authors:
;  [1]
  1. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
Publication Date:
OSTI Identifier:
6072974
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter; (United States)
Additional Journal Information:
Journal Volume: 48:13; Journal ID: ISSN 0163-1829
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; HIGH-TC SUPERCONDUCTORS; MAGNETIC FLUX; BISMUTH OXIDES; CALCIUM OXIDES; COPPER OXIDES; MONOCRYSTALS; STRONTIUM OXIDES; ALKALINE EARTH METAL COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTALS; OXIDES; OXYGEN COMPOUNDS; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS; 665411* - Basic Superconductivity Studies- (1992-)

Citation Formats

Wang, Z, and Shi, D. Thermally activated flux avalanches in single crystals of high-[ital T][sub [ital c]] superconductors. United States: N. p., 1993. Web. doi:10.1103/PhysRevB.48.9782.
Wang, Z, & Shi, D. Thermally activated flux avalanches in single crystals of high-[ital T][sub [ital c]] superconductors. United States. https://doi.org/10.1103/PhysRevB.48.9782
Wang, Z, and Shi, D. 1993. "Thermally activated flux avalanches in single crystals of high-[ital T][sub [ital c]] superconductors". United States. https://doi.org/10.1103/PhysRevB.48.9782.
@article{osti_6072974,
title = {Thermally activated flux avalanches in single crystals of high-[ital T][sub [ital c]] superconductors},
author = {Wang, Z and Shi, D},
abstractNote = {We have experimentally investigated long-time ([gt]10 h) magnetic relaxation in single crystals of Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub [ital x]] and YBa[sub 2]Cu[sub 8]O[sub [ital x]] at wide ranges of temperature and field. We have found that the flux motion in single crystals of high-[ital T][sub [ital c]] superconductors exhibits two distinctly different behaviors at a wide regime of driving force. At large driving force, the flux motion is dominated by thermally activated avalanches, which can be described by a so-called self-organized criticality theory. At small driving force, however, the avalanche effect is significantly reduced, and the flux motion is characterized by slow creep which can be described by the Anderson-Kim model. Therefore, there is a dynamic crossover between the flux avalanches and a pure thermally activated regime in high-[ital T][sub [ital c]] superconductors.},
doi = {10.1103/PhysRevB.48.9782},
url = {https://www.osti.gov/biblio/6072974}, journal = {Physical Review, B: Condensed Matter; (United States)},
issn = {0163-1829},
number = ,
volume = 48:13,
place = {United States},
year = {Fri Oct 01 00:00:00 EDT 1993},
month = {Fri Oct 01 00:00:00 EDT 1993}
}