Vortex Behaviors Near Irreversibility Fields of a-Axis Oriented Y123 Films Inserted Pr123 Layers

The irreversibility temperatures were measured for a -axis oriented and c -axis in-plane aligned Y123/Pr123 multilayer films in various magnetic fields. Pr123 layers act as two-dimensional (planer) c -axis correlated artificial pinning centers (APCs) in the multilayer films. In the irreversibility f...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2009-06, Vol.19 (3), p.3499-3502
Main Authors: Takamura, M., Mukaida, M., Horii, S., Ichinose, A., Kita, R., Namba, M., Awaji, S., Watanabe, K., Matsumoto, K., Yoshida, Y.
Format: Article
Language:English
Subjects:
Applied sciences
Crossovers
Electrical engineering. Electrical power engineering
Electromagnets
Exact sciences and technology
Fluid flow
Frequency
High-temperature superconductors
Magnetic field measurement
Magnetic fields
Magnetic films
Magnetic multilayers
multilayer films
Multilayers
Nonhomogeneous media
Pinning
Pulsed laser deposition
Superconducting films
Superconductivity
Temperature measurement
Two dimensional
Various equipment and components
vortex pinning
Vortices
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Summary:The irreversibility temperatures were measured for a -axis oriented and c -axis in-plane aligned Y123/Pr123 multilayer films in various magnetic fields. Pr123 layers act as two-dimensional (planer) c -axis correlated artificial pinning centers (APCs) in the multilayer films. In the irreversibility field-temperature ( B irr - T ) curves, the crossover was observed near matching field B phi for the multilayer films, when the magnetic fields were applied parallel to the c -axis of the film ( B // c ). It is suggested the vortex state in Y123 films with two-dimensional APCs is Bose glass below the crossover field. The B irr - T curves under B // a shifted toward lower temperature and magnetic field regions.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2009.2019552