Textured Sc-doped Barium Ferrite for Microwave Device Applications

Ba (Sc)-hexaferrite has great potential in industry as a material for self-biased nonreciprocal devices operating at microwave frequencies below 18GHz ((D.B. Nicholson), (G.F. Dionne and J.F. Fitzgerald, 1991),(A Gruskova, 1994), (M.A. Tsankov and L. G. Milenova, 1993), (Cham Kiong Queck and L.E. Davis, 2003)). Here, we synthesized pure Ba(Sc)-hexaferrite by using conventional ceramic method followed by ball milling and compacted with a dc magnetic field (~12 kOe) to orient the particles with C-axis parallel to the applied field. The structural and magnetic properties were measured by XRD, SEM,FMR and VSM respectively. The desired magnetic and high frequency properties were obtained by optimizing the milling speed, time and sintering temperatures.