Theory of spin waves in a multiple band itinerant antiferromagnet
- 1 October 1973
- journal article
- Published by IOP Publishing in Journal of Physics F: Metal Physics
- Vol. 3 (10) , 1874-1890
- https://doi.org/10.1088/0305-4608/3/10/021
Abstract
A method of calculating the long wavelength spin wave frequencies in a multiple band itinerant antiferromagnet is described. No special features of the band structure, such as nesting, are assumed. The frequencies are derived by examining the poles of the RPA generalized susceptibility for the d electrons. A natural consequence of the treatment is the existence of a spin wave damping proportional to the wavevector. This is attributed to the decay of the spin wave into an electron-hole pair. The formulae are applied numerically to gamma manganese. Rough agreement with experiment is found.Keywords
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