Synthesis and characterization of Zn2U (Ba4Zn2Fe36O60) hexaferrite powder

Polycrystalline Zn2U (Ba4Zn2Fe36O60) was synthesized. The high-energy milling of the starting powders activated the synthesis of the Zn2U at 1100 °C. Energy dispersive spectroscopy supported by x-ray diffraction analysis confirmed that pure Zn2U was synthesized in the temperature range 1200–1300 °C. The magnetic properties of the Zn2U were measured. The coercivity varied with the synthesis conditions, while the saturation magnetization was independent of the synthesis conditions. Nevertheless, both the coercivity and the saturation magnetization were different from those of the basic components of the Zn2U crystal structure: M (BaFe12O19) and Zn2Y (Ba2Zn2Fe12O22).

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