Very thin barium ferrite particles prepared by a novel technique: Ion exchange resin method

Abstract

Very thin hexagonal barium ferrite particles have been prepared by a new method-ion exchange resin method. The exchanged resin when heated to 850°C, transformed to the hexagonal ferrite BaFe12O19 as confirmed by x-ray diffraction. These particles show single-domain behavior with average diameter D̄=220 nm, average aspect ratio D̄/t̄=13, specific magnetization σ=71 emu/g and coercivity Hc=3800 Oe. © 1999 American Institute of Physics.