I. Introduction
Barium ferrite doped by scandium [1] has great potential as a self-biased material for nonreciprocal passive device applications below 18 GHz [2]–[4]. This frequency range is heavily utilized in industries for applications in radar and wireless communication technologies [5]–[6]. The goal in processing this material BaFe11ScO19 for circulator device applications is to maintain high saturation and remanent magnetizations with the -axis aligned perpendicular to the plane of the compact. In addition to these magnetic and structural properties, the materials should have a minimal microwave loss, i.e., a ferromagnetic resonance (FMR) linewidth of 39.8 kA/m, at the targeted frequencies. Here, we describe the processing of pure phase powders, compaction within a high magnetic field, and optimal sintering conditions to obtain highly textured compacts having uniaxial magnetic properties. Hysteresis loop squareness is measured to be 0.83 and the FMR derivative linewidth was 79.6 kA/m at 9.5 GHz.