Coexistence of spin-triplet superconductivity and ferromagnetism induced by the local Hund's rule exchange
Jozef Spalek, Pawel Wrobel
Abstract
We characterize the coexistence of itinerant ferromagnetism and spin-triplet superconductivity within a single mechanism involving local (Hund's rule) exchange among d electrons. The ratio of transition temperatures and the spin anisotropy of the superconducting gap is estimated for ZrZn2. The A phase is stable in very low applied and molecular fields, whereas the A1 phases persists in higher fields. A small residual magnetic moment is present below the Stoner threshold in the superconducting phase.
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