Regensburg 2010 – scientific programme
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MA: Fachverband Magnetismus
MA 33: Poster II
MA 33.49: Poster
Friday, March 26, 2010, 11:00–14:00, Poster B1
Spin-waves decay in a helicoidal magnetic. — •Dmitri Efremov and Giniyat Khaliullin — MPIFKF, Stuttgart
We investigate Heisenberg magnetic with ferromagnetic nearest J1, and antiferromagnetic next-nearest J2 and next-next-next nearest J4 spin interactions. We show that the phase diagram consists on several phases: ferromagnetic, Neel antiferromagnetic, A-, helicoidal phases. We argue that spin waves in the helicoidal phase near to a transition point are highly damped. We compare the obtained results with the experiments on inelastic neutron scattering study of iron perovskite oxides such as CaFeO3.