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Title: Dissipation in high-temperature superconductors in a magnetic field

Abstract

The absence of a Lorentz force dependence on dissipation in the highly anisotropic high-temperature superconductor, Tl{sub 2}Ba{sub 2}CaCu{sub 2}O{sub x}, has been measured over a wide range of current densities in broadened resistive transitions, current-voltage characteristics, magnetoresistances, and critical current densities, J{sub c}. The magnetoresistances are very useful to find out the correct temperature and field dependences of the activation energy. As an alternative to flux motion, we consider a Josephson-coupling model which is consistent with the broadened resistive transitions and the lack of Lorentz- force dependence. The authors found that the Josephson- coupling model agrees with the temperature dependences of the activation energy and J{sub c} and is better matched to the weak field dependence of J{sub c} than the flux creep mode. In this paper possible origins of Josephson junctions in high-quality films and single crystals are discussed.

Authors:
; ; ; ;  [1]
  1. Argonne National Lab., IL (United States). Materials Science and Technology Div.
Publication Date:
OSTI Identifier:
5717766
Report Number(s):
CONF-900944-
Journal ID: ISSN 0018-9464; CODEN: IEMGA
Resource Type:
Conference
Journal Name:
IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)
Additional Journal Information:
Journal Volume: 27:2; Conference: 1990 applied superconductivity conference, Snowmass, CO (United States), 24-28 Sep 1990; Journal ID: ISSN 0018-9464
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BARIUM OXIDES; ELECTRICAL PROPERTIES; ENERGY LOSSES; SUPERCONDUCTIVITY; CALCIUM OXIDES; COPPER OXIDES; THALLIUM OXIDES; ANISOTROPY; CRITICAL CURRENT; CURRENT DENSITY; DISSIPATION FACTOR; ELECTRIC CONDUCTIVITY; HIGH-TC SUPERCONDUCTORS; JOSEPHSON JUNCTIONS; LORENTZ FORCE; MAGNETIC FIELDS; MAGNETIC FLUX; MAGNETORESISTANCE; TEMPERATURE DEPENDENCE; ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; CURRENTS; ELECTRIC CURRENTS; JUNCTIONS; LOSSES; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SUPERCONDUCTING JUNCTIONS; SUPERCONDUCTORS; THALLIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; 360207* - Ceramics, Cermets, & Refractories- Superconducting Properties- (1992-)

Citation Formats

Kim, D H, Gray, K E, Kampwirth, R T, McDonald, D B, and McKay, D M. Dissipation in high-temperature superconductors in a magnetic field. United States: N. p., 1991. Web.
Kim, D H, Gray, K E, Kampwirth, R T, McDonald, D B, & McKay, D M. Dissipation in high-temperature superconductors in a magnetic field. United States.
Kim, D H, Gray, K E, Kampwirth, R T, McDonald, D B, and McKay, D M. Fri . "Dissipation in high-temperature superconductors in a magnetic field". United States.
@article{osti_5717766,
title = {Dissipation in high-temperature superconductors in a magnetic field},
author = {Kim, D H and Gray, K E and Kampwirth, R T and McDonald, D B and McKay, D M},
abstractNote = {The absence of a Lorentz force dependence on dissipation in the highly anisotropic high-temperature superconductor, Tl{sub 2}Ba{sub 2}CaCu{sub 2}O{sub x}, has been measured over a wide range of current densities in broadened resistive transitions, current-voltage characteristics, magnetoresistances, and critical current densities, J{sub c}. The magnetoresistances are very useful to find out the correct temperature and field dependences of the activation energy. As an alternative to flux motion, we consider a Josephson-coupling model which is consistent with the broadened resistive transitions and the lack of Lorentz- force dependence. The authors found that the Josephson- coupling model agrees with the temperature dependences of the activation energy and J{sub c} and is better matched to the weak field dependence of J{sub c} than the flux creep mode. In this paper possible origins of Josephson junctions in high-quality films and single crystals are discussed.},
doi = {},
journal = {IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)},
issn = {0018-9464},
number = ,
volume = 27:2,
place = {United States},
year = {1991},
month = {3}
}

Conference:
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