2004/07/22 by Mauro M. Doria, Mauro M. Dória, Antonio R. de C. Romaguera · 1 citation
Physics and Astronomy · #Advanced Chemical Physics Studies #Physics of Superconductivity and Magnetism #Superconductivity in MgB2 and Alloys #cond-mat.supr-con
paper · pdf · doi:10.1209/epl/i2004-10072-2
published as Europhys. Lett., 67 (3), pp. 446--452 (2004) · 7 pages, 4 figures, to be published in Europhysics Letters
arxiv created 2004/07/22 · openalex publication_date 2004/08/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
An extreme type-II superconductor with internal insulating regions, namely cavities, is studied here. We find that the cavity-bearing superconductor has lower energy than the defect-free superconductor above a critical magnetic induction B * for insulating cavities but not for metallic ones. Using a numerical approach for the Ginzburg-Landau theory, we compute and compare free energy densities for several cavity radii and at least for two cavity densities, assuming a cubic lattice of spherical cavities.