High magnetic performance in Al‐substituted BaFe ₁₂ O ₁₉ by a wet chemical process

Abstract

A wet chemical process has prepared Al-substituted barium ferrite nanoparticles BaFe 11 AlO 19 . Structural and magnetic properties of BaFe 11 AlO 19 powers were characterized with an X-ray diffractometer, a vibrating sample magnetometer, and a Mössbauer spectroscopy. The results of X-ray diffraction measurements showed that the BaFe 11 AlO 19 had an M-type hexagonal structure with lattice parameters a 0 =5.871, c 0 =23.190 Å and X-ray density x ρ =5.194 g/cm 3 . The particle size was 37 nm. Mössbauer spectra of Ba- 6 erg/cm 3 at room temperature, as determined the law of approach to saturation (LAS). The saturation magnetization was 44.3 emu/g and the coercivity was 7.56 kOe.

High Coercive Barium Hexaferrite Powders by Partial Ba2+- and Fe3+-Substitution for Magnetic Sensor Applications

“…Other investigations were made to substitute the Fe 3+ by Al 3+ by a wet chemical method [3]. Thereby the coercivity increases, but the saturation magnetization decreases.…”