Effect of titanium ion substitution in the barium hexaferrite studied by Mössbauer spectroscopy and X-ray diffraction

Abstract

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Long Time Stability Investigation for Structural and Magnetic Properties of Ti-doped Barium Ferrite

“…[6] The main applications of these materials intend to reduce the human exposure to microwaves by means of absorbing coatings. [2,7] Ti-doped BHF powder is an efficient absorber of electromagnetic waves in the microwave spectrum. To optimize the Ti-doped BHF microwave absorption properties increase in the saturation magnetization (M S ) and a decrease in the coercivity (JH C ) are required.…”

“…BHF is attractive due to its high stability, excellent high-frequency response, narrow switching field distribution and its temperature coefficient of coercivity in various applications, fairly large magnetocrystalline isotropy, high Curie temperature and relatively large magnetization, corrosion resistivity as well as chemical stability. [1][2][3][4][5][6][7][8][9][10][11][12][13] In this paper, BHF substituted by Ti 4+ (chose cosubstitution non-magnetic Ti 4+ ions for Fe 3+ at different levels to obtain a wide range of coercivity and high magnetic permeability) using conventional ceramic techniques is investigated by differential thermal analysis, X-ray diffraction (XRD), scanning electron microscopy (SEM), and magnetic measurements by vibrating sample magnetometer (VSM). The approach to saturation law was used to determine zero-field saturation magnetization M s and anisotropy field H a .…”