Abstract
Multiferroic materials attracted a lot of attention in recent years because of their significant scientific interest and technological applications. The multiferroic core/shell powders have a better connectivity between the phases, resulting in superior dielectric and magneto electric properties. In this study, the influence of preparation condition on structure and properties of BaTiO3/α-Fe2O3 core/shell composite materials was examined. The five samples were obtained by varying synthesis conditions, such as synthesized method (co-precipitation and sonochemical method) and pH values of solution. XRD and Raman spectroscopy analyses were performed in order to determine phase composition and structural changes within samples. Morphology modifications were examined by SEM and EDS analyses. Finally, effect of structural and microstructural changes on magnetic and electrical properties was detected and explained.
Highlights
It was demonstrated that multiferroic core/shell structures have a better connectivity between the phases, resulting in superior dielectric and magnetoelectric properties [16]
Our investigation has shown that the applied mechanical activation can lead to the formation of nanocrystalline tetragonal structure, even for particles as small as ~30 nm [28]. Taking all this into account and since, up to now, no systematic analysis of the synthesis and properties of BaTiO3/α-Fe2O3 core/shell structured materials has been performed, in this article, our research focuses on the effects of preparation condition on structure and properties of this type of ceramics
BTF2 was synthesized in the same way as BTF1, the difference was only in changes of weight ratio BaTiO3 to Fe(NO3)3·9H2O
Summary
J Adv Ceram 2019, 8(1): 133–147 termed ferroelectromagnetic multiferroics) are especially important, because they can be used in various microelectronic devices, including microwave phase shifters, magnetically controlled electro-optic or piezoelectric devices, and broadband magnetic field sensors [3,4,5]. Our investigation has shown that the applied mechanical activation can lead to the formation of nanocrystalline tetragonal structure, even for particles as small as ~30 nm [28]. Taking all this into account and since, up to now, no systematic analysis of the synthesis and properties of BaTiO3/α-Fe2O3 core/shell structured materials has been performed, in this article, our research focuses on the effects of preparation condition on structure and properties of this type of ceramics
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