Structure, magnetic and dielectric properties of Bi5Ti3FeO15 multiferroic ceramics after high energy ball milling and free sintering process.

Grzegorz Dercz 1Jolanta Rymarczyk 2Krystian Prusik 1Aneta Hanc 1Lucjan Pająk 1Jan Ilczuk 2

1. University of Silesia, Institute of Material Science, Bankowa 12, Katowice 40-007, Poland
2. University of Silesia, Department of Material Science, Żeromskiego 3, Sosnowiec 41-200, Poland

Abstract

The Bi5Ti3FeO15 ceramic belongs to ferroelectromagnetics characterized by presence of simultaneous magnetic and ferroelectric ordering. This class of materials exhibits a spontaneous magnetization and polarization that can be switched by an applied magnetic and electric field, respectively.

The Bi5Ti3FeO15 (BTF) multiferroic ceramic can be applied during construction of different electronic devices of new generation. This type of ceramics is promising owing to the possibility of their applications as different types of memory elements.  

In this paper the structural, magnetic and dielectric properties of the multiferroic ceramics Bi5Ti3FeO15 are presented.

The test material was prepared in two stages. In the first stage it was obtained as a result of the reaction in the solid phase synthesis from the mixture of the bismuth (Bi2O3), titanium (TiO2) and iron (Fe2O3) simple oxides. Polycrystalline precursor material (mixture of Bi2O3, TiO2 and Fe2O3 powders) was milled by high-energy vibratory mill for 1, 3, 5 and 10 hours. The second stage free sintering synthesis reaction was conducted at 800ºC temperature in 5 h time.

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 Williamson-Hall method. The values of lattice parameters determined by Rietveld method. Investigations of hyperfine interactions in the studied materials were carried out by Mössbauer spectroscopy. The powder morphology was analyzed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. Thermal dependence of dielectric permittivity was studied. Hysteresis loop was observed and magnetic properties of multiferroic ceramics were investigated.

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Presentation: Poster at E-MRS Fall Meeting 2008, Symposium I, by Grzegorz Dercz
See On-line Journal of E-MRS Fall Meeting 2008

Submitted: 2008-05-12 22:13
Revised:   2009-06-07 00:48
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