Effect of Ni and Al substitution on the magnetic properties of Y-type hexaferrite Ba_0.5Sr_1.5Zn_0.5Ni_1.5Fe_11.92Al_0.08O₂₂ powders

Abstract The effect is reported of substituting the non-magnetic Zn 2+ cations with magnetic Ni cations, and Fe 3+ Al in Ba 0.5 Sr 1.5 11.92 0.08 O 22 on resulting properties. Y-type hexaferrite powders were synthesized by citric acid sol-gel auto-combustion, followed appropriate thermal annealing. saturation magnetization values ( M s ) a field 50 kOe 36 emu/g 30 at 4.2 K 300 K, respectively. zero-field-cooled (ZFC) field-cooled (FC) vs. temperature (4.2 – K) measured dc fields Oe, 100 Oe 500 Oe. changes from dissimilar cationic substitutions identified discussed.