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Hoez, Antoine; Mattei, Jean-Luc; Chevalier, Alexis
IEEE transactions on magnetics, 11/2023, Letnik: 59, Številka: 11Journal Article
M-type hexagonal barium ferrites Ba(M x Ti x )Fe 12-2 x O 19 (M = Co or Zn, x = 0-0.5) were synthesized by chemical topotactical reaction. Both randomly oriented and self-polarized samples were prepared. Experimental values of the anisotropy fields, first and second anisotropy constants, and remanent magnetizations were extracted by combining hysteresis loops and microwave measurements. A salient result of this study is that, compared with K 1 , K 2 cannot be disregarded for these co-doped BaM hexaferrites, even at low doping levels. Results show that the BaM ferrites of composition Ba(Co x Ti x )Fe 12-2 x O 19 are more suitable for microwave applications that operate at frequencies between 30 GHz and 40 GHz.
