Polarization dependence of the dynamic susceptibility χ’’(ω) in chromium

Publisher Website
Google Scholar
Abstract
Neutron scattering measurements characterizing the polarization, energy, and temperature dependence of the magnetic excitations of the longitudinally polarized spin density wave phase of chromium are presented. Careful consideration of spectrometer resolution effects has resulted in the first quantitative expressions for the cross sections associated with the longitudinally and transversely polarized excitations. These results, together with a simple parametrization of the dynamic susceptibility, χ’ ’(ω)∝A(ω)/ω, reveal a simple dependence of these excitations on energy at all temperatures below the spin-flip transition.