Relaxation of uniform magnetization precession in collinear cubic ferrimagnets in the paramagnetic neighbourhood of Tc
Berzhanskii V. N. , Ivanov V. I. , Lazuta A. V.
The characteristic features of the critical spin dynamics of the cubic ferrimagnets Y3Fe5012 and MnFe204 in the exchange temperature region above Tc have been studied. The magnetic-dipole relaxation of the uniform magnetization of these ferrimagnets is shown to be suppressed. The relaxation channel due to the local uniaxial anisotropy, with a new temperature dependence, is the dominant channel.