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In this paper the structural and Mössbauer spectral properties of multiferroic ceramic Bi5Ti3FeO15 powders prepared by high-energy ball milling of polycrystalline precursor material (mixture of Bi 2 O 3 , TiO 2 and Fe 2 O 3 powders) are presented. Mechanical synthesis was performed by high-energy vibratory mill. The X-ray diffraction methods were applied for the structure characterization of the studied samples. The parameters of diffraction line profiles were determined by PRO-FIT Toraya procedure. The crystallite sizes and lattice distortions were analyzed using the Williamson-Hall method. Investigations of hyperfine interactions in the studied materials were carried out by the Mössbauer spectroscopy. The powder morphology was analyzed by scanning electron microscopy and transmission electron microscopy techniques. It was found that during high-energy milling phase transitions, a decrease in crystallite size and amorphization process are observed.

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Magnetoelectric multiferroics are materials which exhibit both magnetic order and ferroelectricity in the same phase. Multiferroic materials, where ferroelectricity and magnetism coexist, were extensively studied. This class of materials offers a large application potential for new devices due to the two coupled degrees of freedom based on the local off-centered distortion and the electron spin. The studied Bi 5 Ti 3 FeO 15 ceramics was prepared by conventional synthesis and hot uniaxial pressing reaction applying the conventional mixture of TiO 2 , Fe 2 O 3 and Bi 2 O 3 oxides as precursor materials. The present work focuses on the structure analysis of multiferroic Bi5Ti3FeO15 ceramics performed by X-ray diffraction method, scanning electron microscopy and the Mössbauer spectroscopy methods.

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