الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Currently, multiferroic materials have attracted considerable research interest due to their promising potential applications in information storage and magnetoelectric devices where the electric polarization could be controlled by a magnetic field and the magnetization by an electric field. The nanostructured 0.52Bi2O3-0.18Fe2O3- 0.30BaTiO3 mol% (BFBT) and 0.52Bi2O3-0.18Fe2O3-0.30PbTiO3 mol% (BFPT) systems were prepared by mechanical milling technique to study their multiferroic properties and the relaxor multiferroic nature of them. In this context, the effects of mechanical milling and heat-treating temperatures on the structural characterization, dc conductivity, and transport properties of the nanostructured BFBT and BFPT samples have been investigated from the point of view of different models. The dielectric properties, ac conductivity, polarization, magnetization, and relaxor nature of these samples have also been studied in detail. After the application of mechanical milling at different milling times and heat treating temperatures to the prepared samples, the nanostructure formation and the formed phases of the samples were investigated by X-ray diffraction (XRD) and confirmed by high-resolution electron microscope (HR-TEM) micrographs. The samples are also characterized and identified by Fourier transform infrared (FTIR). The dc conductivity and density were measured for the nanostructured BFBT and BFPT samples milled for 5 h in a high energy ball mill, followed by heat-treatment at 673, 873, and 1073K for 5 h.