Preparation and characterization of (1-y)BiFeO3/y(Ba0.7Na0.3Ti0.7Nb0.3)O-3 multiferroic ceramics

作者：Jarboui Ahmed^*; Bahri Fathi; Khemakhem Hamadi

来源：The European Physical Journal - Applied Physics, 2013, 62(1): 10303.

DOI：10.1051/epjap/2013120237

We present in this work a contribution to the study of the solid solution (1 - y)BiFeO3/y(Ba0.7Na0.3Ti0.7Nb0.3)O-3. Room temperature X-ray diffraction patterns for some prepared compositions confirmed the formation of perovskite structure. The study of the evolution of dielectric properties as a function of sintering temperature allowed us to determine the optimum conditions that minimize the presence of defects and oxygen stoichiometric limit fluctuations due to the volatility of bismuth. The variation of permittivity as a function of temperature and frequency for the (1 - y)BiFeO3/y(Ba0.7Na0.3Ti0.7Nb0.3)O-3 solid solution was measured. The effect of Ba0.7Na0.3Ti0.7Nb0.3O3 addition content on crystal structure, dielectric and magnetic properties of BiFeO3 was investigated. Raman measurements reveal resonant enhancement of two-phonon excitation for (1 - y)BiFeO3/y(Ba0.7Na0.3Ti0.7Nb0.3)O-3 samples. We also expect that the solid solution shows weak ferromagnetic behavior for low Ba0.7Na0.3Ti0.7Nb0.3O3 levels of substitution.

• 出版日期2013-4