2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/15281Within recent nonperturbative approaches to the effective quark interaction the diquark condensate forms a superconductor of second kind. Therefore the magnetic field will not be expelled from the superconducting quark core in accordance with observational data which indicate that life times of pulsar magnetic fields exceed 10^7 years.2 pages, 2 eps figures, to be published in Proceedings of IAU Colloquium 177: "Pulsar Astronomy - 2000 and Beyond", ASP Conf. SeriesAstrophysicstext