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

E.S. Al-Hwaitata, M.A. Husseina, I. Bsoulb, R.A. Buqainc, S.H. Mahmooda aDepartment of Physics, The University of Jordan, Amman 11942, Jordan bDepartment of Physics, Al al-Bayt University, Mafraq 13040, Jordan cCell thereby centre, The University of Jordan, Amman 11942, Jordan

Received: July 26, 2019; in final form August 9, 2019

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This article is concerned with the synthesis of high-quality (Mg, Zn)2Z hexaferrites. A series of the ferrites Ba3(ZnxMg1-x)2Fe24O41 (x=0.5, 0.7, and 1.0) were prepared by high-energy ball milling and sintering at 1250° 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 ~19 GHz for all samples.

DOI:10.12693/APhysPolA.136.548 topics: Z-type hexaferrites, structural properties, magnetic properties, initial permeability, FMR frequency