2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/46054The expulsion of magnetic flux lines from a growing superconducting core of a quark star has been investigated using the idea of impurity diffusion in molten alloys. The possibility of Mullins-Sekerka normal-superconducting interface instability has also been studied.16 pages TEX file, no figureHigh Energy Physics - PhenomenologyExpulsion of Magnetic Flux Lines from Growing Superconducting Core of a Quark Star and The Possibility of Mullins-Sekerka Interface Instabilitytext