Abstract
The influence of different types of single-ion anisotropy (easy-axis and easy-plane) on the phase states and on the dynamic properties of non-Heisenberg spin-1 magnet was investigated in the mean-field approximation. It was shown that account of the easy-axis single-ion anisotropy almost does not result in deviation of system’s properties from the isotropic case; while account of the easy-plane single-ion anisotropy changes the type of the phase transitions between the dipolar and the nematic phases and results in disappearance of SU(3) point. The phase diagrams of the system were drawn for both types of anisotropy.
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