Impact of Stoichiometry and Sintering Temperature on Magnetic Properties of Y3MnxAl0.83−xFe4.17O12 Ferrites

A study was made to evaluate the impacts of stoichiometry and sintering temperature on hysteresis properties of an Mn, Al substituted Y₃Fe₅O₁₂ (YIG) ferrite. The Mn, Al substituted YIG ferrite, (Y₃)(Mn_xAl_0.83-xFe_4.17)O₁₂ showed the best properties for application in 2-4 GHz frequency range (i.e., S-band) latching phase shifter at x =0.13 . Magnetic characteristics were further improved by sintering process. The increasing sintering temperature increases saturation magnetization (4π M_s), remanence (B_r), and squareness ratio, while decreasing the coercivity (H_c). In addition, good ferromagnetic resonance linewidth (i.e., ΔH) properties were also realized as 38.6 Oe at 3.2 GHz. Based on above magnetic characteristics, (Y₃)(Mn_xAl_0.83-xFe_4.17)O₁₂ is a good candidate for practical latch phase shifter applications at S-band.