Affect on magnons energy spectrum of ferrimagnetism two-dimensional rectangle lattice by lattice coefficient;

X-Y-Z mode anisotropic ferrimagnetism ground state inner energy of two-dimensional rectangle double lattice under Heisenberg system;

In order to study X-Y-Z model anisotropic ferrimagnetism the solution of double tetragonal lattice spin wave under Heisenberg system.

Energy spectra of double-layer ferrimagnetic superlattices;

The results indicate that for both NaCl and CsCl structure ferrimagnets the results of spin wave spectra and mean values of spin vector in Z-direction are strongly different from that of the ferrimagnets with the nearest-neighbor interactions only.