Volume 62, Number 1, April 2003
|Page(s)||63 - 68|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 March 2003|
Phase diagram of vortex lattice on a square pinning array in superconducting films
Institute of Physics, Academy of Sciences of the Czech Republic
Na Slovance 2, 182 21 Prague 8, Czech Republic
Accepted: 24 January 2003
We have analyzed the phase transitions in a square lattice of vortices using the thermodynamic approach. For a square array of the artificially created pin centers in superconducting film we have calculated the phase diagram, which reveals the re-entrant melting features. We explain this effect by the nonmonotonic temperature dependence of the vortex-vortex interaction potential.
PACS: 68.35.Rh – Phase transitions and critical phenomena / 74.25.Bt – Thermodynamic properties / 74.60.Ge – Flux pinning, flux creep, and flux-line lattice dynamics
© EDP Sciences, 2003
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