Magnetic properties of Me–Zr substituted Ba–hexaferrite

Abstract Substituted M-type Ba hexaferrites of composition BaFe 12−2 x Me x Zr x O 19 were investigated, where Me stands for Ni 2+ , Co 2+ or Zn 2+ . The series with x varying from 0 to 0.6, were prepared by two processing routes. A Fe/Ba ratio of 10 for mechanical alloying and of 10.8 for the citrate precursor method was chosen. It was shown that (Co, Ni, Zn)-Zr doped Ba ferrite particles have positive temperature coefficient of H c , which decreases with increasing x .