Millimeter Wavelength Nonlinear Excitation for Vanishing Anisotropy of Planar Hexaferrite

In the past decades, nonlinear excitations of magnetic systems under microwave fields were widely studied by experimental and theoretical investigations of high power microwave parallel pumping. Hexaferrite may be the only choice for THz applications of magnetic materials in modern technology. However, its applications are limited because of high power requirements and bulkiness. In order to solve these issues, we present a model for the controllable basal plane anisotropy field of planar hexaferrite, which is able to create an environment for nonlinear excitations in ordinary power applications of microwaves. We also present the micron size ferrite resonator's geometrical effect on the excitations.