Temperature Dependence of Magnetic Inelastic Neutron Scattering in Mn(12%Ge) Alloy |
| J. Jankowska-Kisielińska, K. Mikke, J.J. Milczarek Institute of Atomic Energy, Świerk, 05-400 Otwock, Poland B. Hennion Laboratoire Léon Brillouin, CEN Saclay, France and V.A. Udovenko Institute of Physical Metallurgy, Moscow, Russia |
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| A systematic study of temperature dependence of magnetic inelastic neutron scattering for itinerant antiferromagnet Mn(12%Ge) is presented. At low temperatures the experimental data are well described in terms of damped spin waves. This description becomes insufficient at least 150 K below TN. In the temperature range 200-400 K the integrated intensity of distribution for energy transfer 13 THz increases by one third and the shape of the deconvoluted neutron scattering cross-section changes. These changes suggest that ca. 200 K below TN an additional contribution to the inelastic neutron scattering starts to appear and that its origin is different from spin waves. |
| DOI: 10.12693/APhysPolA.91.483 PACS numbers: 75.30.Ds, 75.50.Ee |