Phys Rev Lett. 2001 Jan 29;86(5):846-9 doi: 10.1103/PhysRevLett.86.846.

Coexistence of superconductivity and ferromagnetism in ferromagnetic metals

Karchev NI, Blagoev KB, Bedell KS, Littlewood PB.

Abstract

We address the question of coexistence of superconductivity and ferromagnetism. Using a field theoretical approach we study a one-fermion effective model of a ferromagnetic superconductor in which the quasiparticles responsible for the ferromagnetism form the Cooper pairs as well. For the first time we solve self-consistently the mean-field equations for the superconducting gap and the spontaneous magnetization. We discuss the physical features which are different in this model and the standard BCS model and consider their experimental consequences.

PMID: 11177955