Magnetoceramics are insulating magnetic materials that offer high performance and a means to break time reversal symmetry at RF frequencies. As such, these materials provide
non-reciprocal performance in RF isolators and circulators among other devices. Here, we present a review of the basic principles of modern magnetoceramics in the context of next
generation RF device electronics including self-biased circulators/isolators, and filters and phase shifters.
Starting from a material science perspective, the chemistry, structure, and super-exchange magnetism of magnetoceramics will be discussed. Following this, the role of intrinsic material properties upon functional RF device performance will be presented, including coercivity, magnetic anisotropy, FMR linewidth, magnetism, and device isolation and insertion loss. Additionally, the methods used to process magnetoceramics into usable RF device materials, such as manipulating magnetic anisotropy using crystallographic texture and the integration of ferrite materials onto lattice matched semiconductor substrates, will be reviewed.