Spin wave dispersion just above the magnetic order-order transition in the metallic antiferromagnet Mn3Pt
Open Access
- 1 June 2017
- conference paper
- Published by IOP Publishing in Journal of Physics: Conference Series
- Vol. 868 (1) , 012017
Abstract
Spin wave dispersion of the metallic antiferromagnet Mn3Pt was investigated just above the order-order transition temperature by using the inelastic neutron scattering technique. The spin wave dispersion at T = 400 K along [100], [110] and [111] directions was isotropic within the measurement accuracy. The dispersion was described by (ħω)2 = c 2 q 2 + δ2 with c = 190 meVÅ and Δ = 3.3 meV. Compared with the previous reports, the result shows that large reduction of the stiffness constant with increasing temperature. This feature is similar to that in FePt3, and will be an indication of the itinerancy of the magnetic moments.Keywords
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