Preparation and Magnetic Properties of Barium Hexaferrite Nanoparticles Produced by the Citrate Process

Abstract

The sol‐gel synthesis technique has been used to produce barium ferrite particles. Several methods such as X‐ray diffractometry, transmission electron microscopy, and magnetism measurement (VSM) have been used to obtain detailed information on the crystallography and magnetic properties of the precursor and the calcined particles. The correlation of BaFe 12 O 19 formation with the precursor properties and thermal treatment has been studied. The optimum conditions for preparing BaFe 12 O 19 nanoparticles at a low calcining temperature are reported, and homogeneous ultrafine BaFe 12 O 19 with almost‐ideal single‐domain behavior and coercive force (5950 Oe) and specific magnetization (70 emu/g) values that are similar to the theoretically predicted values is obtained.