Coexistence of spin-triplet superconductivity and ferromagnetism induced by the local Hund's rule exchange

Details Coexistence of spin-triplet superconductivity and ferromagnetism induced by the local Hund's rule exchange Coexistence of spin-triplet superconductivity and ferromagnetism induced by the local Hund's rule exchange

2002-02-04

arxiv.org/abs/cond-mat/0202043v1

Physics

Condensed Matter

Superconductivity

Submitted to Phys. Rev. B

Scientific paper

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 $ZrZn_2$. 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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