Document Detail


The role of temperature in the magnetic irreversibility of type-I Pb superconductors.
MedLine Citation:
PMID:  23139230     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Evidence of how temperature plays a role in the magnetic irreversibility in the intermediate state of a cylinder and various disks of pure type-I superconducting lead is presented. Isothermal measurements of first magnetization curves and hysteresis cycles are analyzed in a reduced representation that defines an equilibrium state for flux penetration in all the samples and reveals that flux expulsion depends on temperature in the disks but not in the cylinder. The magnetic field at which irreversibility sets in along the descending branch of the cycle and the remnant magnetization at zero field are found to decrease with temperature. The contributions to irreversibility of the geometrical barrier and the energy minima associated with stress defects that act as pinning centers on normal-superconductor interfaces are discussed in an effort to account for the results obtained.
Authors:
Saül Vélez; Antoni García-Santiago; Joan Manel Hernandez; Javier Tejada
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-09
Journal Detail:
Title:  Journal of physics. Condensed matter : an Institute of Physics journal     Volume:  24     ISSN:  1361-648X     ISO Abbreviation:  J Phys Condens Matter     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-9     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101165248     Medline TA:  J Phys Condens Matter     Country:  -    
Other Details:
Languages:  ENG     Pagination:  485701     Citation Subset:  -    
Affiliation:
Grup de Magnetisme, Departament de Física Fonamental, Facultat de Física, Universitat de Barcelona, c. Martí i Franquès 1, planta 4, edifici nou, E-08028 Barcelona, Spain. Institut de Nanociència i Nanotecnologia IN2UB, Universitat de Barcelona, c. Martí i Franquès 1, planta 3, edifici nou, E-08028 Barcelona, Spain.
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