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This article is concerned with the synthesis of high-quality (Mg, Zn)(2)Z hexaferrites. A series of the ferrites Ba-3(ZnxMg1-x)(2)Fe24O41 an (x = 0.5, 0.7, and 1.0) were prepared by high-energy ball milling and sintering at 1250 degrees C for 2 h. The structural and magnetic properties of the samples were investigated using X-ray diffraction, scanning electron microscopy, and vibrating sample magnetometer. X-ray diffraction and thermomagnetic studies indicated that the Z-type phase was dominant at x = 0.5, and decreased with the increase of x, whereas the fraction of the Y-type hexaferrite increased. The saturation magnetization and initial permeability, however, increased slightly with the increase of x. The coercivity, on the other hand, was in the range 40-54 Oe for all samples, and the magnetocrystalline anisotropy field did not change significantly with increasing x. The FMR frequency estimated from the static magnetic parameters was approximate to 19 GHz for all samples.

acta physica polonica. a

Synthesis, Structural, and Magnetic Properties of Ba3(ZnxMg1-x)2Fe24O41 Z-Type Hexaferrites