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A simple model for the dc flux transformer in layered superconductors with Josephson coupling

Technical Report:

Abstract

We present a model for the dc flux transformer configuration in layered superconductors with Josephson coupling. It consists of a simple extension of a model introduced by Clem for the traditional dc flux transformer, but including Josephson coupling and dissipation between planes. We calculate the non-linear current-voltage characteristics for different cases. We find two kinds of behaviour. For weak pinning or strong interplane coupling (both due to magnetic forces and Josephson effect) there is an onset of dissipation with the same voltages in both the top and the bottom faces of the sample, at a given critical current. At a higher current there is a decoupling of the two faces where they have different voltages. This corresponds to a cutting of the vortices that occurs between the first (top) and the second planes. The decoupling current is independent of pinning and vanishes linearly with temperature close to T{sub c}. For strong pinning or weak interplane coupling, each face behaves independently with corresponding different critical currents for the onset of dissipation and different voltages. (author). 22 refs, 5 figs.
Authors:
Uprety, K K; [1]  Dominguez, D [2] 
  1. International Centre for Theoretical Physics, Trieste (Italy)
  2. Los Alamos National Lab., Los Alamos, NM (United States). Theoretical Div.
Publication Date:
Sep 01, 1994
Product Type:
Technical Report
Report Number:
IC-94/291
Reference Number:
SCA: 665411; PA: AIX-26:014053; EDB-95:033050; SN: 95001325792
Resource Relation:
Other Information: PBD: Sep 1994
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; JOSEPHSON JUNCTIONS; ELECTRIC CONDUCTIVITY; COUPLING; CRITICAL CURRENT; DECOUPLING; DIRECT CURRENT; EQUATIONS OF MOTION; MAGNETIC FLUX; NONLINEAR PROBLEMS; 665411; BASIC SUPERCONDUCTIVITY STUDIES
OSTI ID:
10113004
Research Organizations:
International Centre for Theoretical Physics (ICTP), Trieste (Italy)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ON: DE95614468; TRN: XA9438436014053
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
INIS
Size:
30 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Uprety, K K, and Dominguez, D. A simple model for the dc flux transformer in layered superconductors with Josephson coupling. IAEA: N. p., 1994. Web.
Uprety, K K, & Dominguez, D. A simple model for the dc flux transformer in layered superconductors with Josephson coupling. IAEA.
Uprety, K K, and Dominguez, D. 1994. "A simple model for the dc flux transformer in layered superconductors with Josephson coupling." IAEA.
@misc{etde_10113004,
title = {A simple model for the dc flux transformer in layered superconductors with Josephson coupling}
author = {Uprety, K K, and Dominguez, D}
abstractNote = {We present a model for the dc flux transformer configuration in layered superconductors with Josephson coupling. It consists of a simple extension of a model introduced by Clem for the traditional dc flux transformer, but including Josephson coupling and dissipation between planes. We calculate the non-linear current-voltage characteristics for different cases. We find two kinds of behaviour. For weak pinning or strong interplane coupling (both due to magnetic forces and Josephson effect) there is an onset of dissipation with the same voltages in both the top and the bottom faces of the sample, at a given critical current. At a higher current there is a decoupling of the two faces where they have different voltages. This corresponds to a cutting of the vortices that occurs between the first (top) and the second planes. The decoupling current is independent of pinning and vanishes linearly with temperature close to T{sub c}. For strong pinning or weak interplane coupling, each face behaves independently with corresponding different critical currents for the onset of dissipation and different voltages. (author). 22 refs, 5 figs.}
place = {IAEA}
year = {1994}
month = {Sep}
}