Dynamical Susceptibility in Ferromagnetic Metal of CoS 2 - Inelastic Magnetic Neutron Scattering -
1997; Physical Society of Japan; Volume: 66; Issue: 3 Linguagem: Inglês
10.1143/jpsj.66.818
ISSN1347-4073
AutoresHaruhiro Hiraka, Y. Endoh, Kazuyoshi Yamada,
Tópico(s)Magnetic properties of thin films
ResumoInelastic neutron scattering experiments from a ferromagnetic metal of CoS 2 have been performed in a wide ( q ,ω) space and a wide temperature range across the Curie temperature, T C . Magnetic excitations in a small q region are well characterized to be spin-waves below T C . The sharp response of the spin-wave scattering suddenly broadens at q > 0.27 Å -1 and ω> 8 meV. The paramagnetic fluctuations above T C are centered at ω=0 meV, which could be analyzed by a double Lorentzian form in q and ω. The line width Γ satisfies the dynamical scaling hypothesis; Γ= A 0 q 2.5 f (κ 1 / q ). The dynamical feature in both below and above T C indicates that CoS 2 is regarded as a typical itinerant ferromagnet.
Referência(s)