Microwave loss in low-magnetization polycrystalline garnets: A comparison of Ga and CA-V-In-substituted YIG

From available single-crystal data on YIG:Ga and YIG :Ca-V-In, a comparison has been made of anisotropy line broadening in each series for compositions with equivalent and Tc. The results indicate the latter materials have smaller anisotropies and should therefore have inherently lower magnetic loss when comparing ceramics with near perfect microstructures, i.e., where porosity line broadening is negligible.