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FLUX PINNING IN HIGH-TEMPERATURE SUPERCONDUCTORS

Objective



The groups collaborating in this project will contribute to research in flux pinning in high temperature superconductors in at least three different ways :
i) fundamental flux-pinning research in single crystals and thin films ii) studies on the connectivity of poly-crystalline materials iii) investigations of the relation between Jc defect morphology and the structure of the HTS.
Regarding the first issue important questions are the role of the small coherence length for the elementary pinning-interaction, the weak coupling between the superconducting CuO layers, the anisotropy, the theoretical modelling for collective pinning and flux creep, the role of the distribution of energy barriers for flux pinning, etc. As to the connectivity it is important to study the relation between the short coherence length and the Josephson coupling between grains, the role of the grain boundary orientation and the oxygen depletion at the grain boundaries, the modelling of randomly connected networks, the developement of texturing techniques, the role of cladding materials like silver and the related proximity coupling, etc... Concerning defect morphology, structure and possible enhancement of Jc it is important to investigate options to add pinning defects without degrading the superconducting properties, to search for ways to increase the superconductive coupling between the CuO planes, to study the effects of heat treatments and oxygen pressure, the role of substitutions of other elements, etc...

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

LEIDEN UNIVERSITY
Address
72,Rapenburg 70
2311 EZ Leiden
Netherlands

Participants (10)

CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS
Spain
Address
Calle Serrano 117
Madrid
Forschungszentrum Karlsruhe Technik und Umwelt GmbH
Germany
Address

76021 Karlsruhe
GEORG-AUGUST-UNIVERSITY GOETTINGEN
Germany
Address
Grisebachstrasse 6
37077 Goettingen
STICHTING KATHOLIEKE UNIVERSITEIT
Netherlands
Address

6500 GL Nijmegen
THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF CAMBRIDGE
United Kingdom
Address
Trinity Lane, The Old Schools,
CB2 1TN Cambridge
THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF OXFORD
United Kingdom
Address
University Offices, Wellington Square
Oxford
UNIVERSIDAD COMPLUTENSE DE MADRID
Spain
Address
2,Avenida De Seneca 2, Ciudad Universitaria
28040 Madrid
UNIVERSITEIT VAN AMSTERDAM
Netherlands
Address
Spui 21
1012 WX Amsterdam
UNIVERSITY OF VIENNA
Austria
Address
Dr Karl Lueger - Ring 1
1010 Wien
Vrije Universiteit Amsterdam
Netherlands
Address
1105,De Boelelaan
1007 MC Amsterdam