Mössbauer investigation of W-type hexaferrite of composition BaZn2−xCoxFe16O27

Tailoring of structural, electrical and magnetic properties of BaCo2 W-type hexaferrites by doping with Zr–Mn binary mixtures for useful applications

“…Adjacent to it, another sextet of k 2 amid a quadrupole splitting and an isomer shift (Table 2) appears and can be ascribed as Fe 3 þ ions in the 12k lattice sites. Similar results were also obtained in case of BaMg 2 Fe 16 O 27 , [23] and for BaZn 2 À x Co x Fe 16 O 27 [24]. Although at higher substituent concentration, the peak splitting of 12k sub-lattice could not be differentiated and appear to have merged in a single peak with low intensity and sufficient broadening ( Table 2).…”

Thermopower studies of some cobalt-substituted BaZn-W hexagonal ferrites

“…As a matter of fact, several reports on the influence of spin reorientation on various physical properties of W-type hexagonal ferrites are available in the literature. For example, Albanese et al [5] observed a spin reorientation transition from a planar configuration to a conical one, while an oblique axial structure, making an angle 70" with the C-axis at 4.2 K determined by means of neutron diffraction, was reported by Collomb et al [6]. However, no reports on the influence of this phenomenon on thermopower are available in the literature.…”

Improvement of the Structural, Electrical and Magnetic Properties of Calcium W-Type Hexaferrite Nano Sized Powders Using Co-Precipitation Method

“…Hence, hexaferrites have been widely adopted in two distinct fields: permanent magnets and microwave technology components [1]. On the other hand, W-type ferrites CaM2Fe16O27 (M = Mg, Mn, Fe, Sr, Co, Ni, Cu, Zn) can undergo spin reorientation transitions (SRT) between different anisotropy configurations (easy plane ↔ easy cone ↔ easy axis) induced by change of temperature or applied magnetic field [2][3][4][5][6][7][8][9]. The transition temperature can be tuned by modifying the chemical composition (substitution of bivalent metal M).…”