Features of the Permeability Spectra of CoZnW Hexaferrites in the Spin-Reorientation Phase Transition Region

The hexaferrites of the Co
_2-x
Zn
_x
W system have a number of outstanding properties among other hexaferrites. This makes them promising both for obtaining new physical data and for practical use. In this paper, we analyze the concentration and temperature dependences of the resonance frequencies of natural ferromagnetic resonance and the damping constant in the equation of motion of the magnetization vector of these materials in the vicinity of spin-reorientation phase transitions. It is shown that these hexaferrites can find practical application in the entire microwave frequency range.