We present a model of changing Fermi surface geometry in a ferromagnetic, spin-split environment, where the control parameter is the Stoner exchange energy. A two-peak density of states, here obtained from a quasione-dimensional bandstructure allows two jumps in magnetisation. The jump at finite magnetisation can be first order, and may occur near a maximum in the transition temperature for a triplet superconducting instability. Our motivation is the ferromagnetic superconductor, UGe2.
|Number of pages||4|
|Journal||Acta Physica Polonica B|
|Publication status||Published - 1 Feb 2003|