Investigation of the non-linear magnetoelectric responses of hexagonal ferrite Zn₂Y

In this study, nonlinear magnetoelectric (NLME) responses of Y-type hexagonal ferrite Zn₂Y to both magnetic and electrical fields were investigated. The observation and measurements of the strong magnetic response was conducted on a well-designed waveguide fabricated with help of photolithography. The hexagonal ferrite was placed at an optimized location for desired response. With an external in-plane magnetic field excitation ranging from 200 Oe to 2800 Oe, a total frequency shift of ~ 10 GHz was observed in the transmission coefficients. By applying an in-plane DC current of 9 mA to the ferrite through metalized pads along the signal direction in the Zn₂Y sample, at the center frequency of 9.8 GHz, a 1.2 GHz shift was measured. The results in this study demonstrate the dual tunability of the magnetic response of Zn₂Y, suggesting its potential applications in frequency control in X band and beyond.