Regensburg 2019 – wissenschaftliches Programm
KFM 14.12: Poster
Mittwoch, 3. April 2019, 16:00–18:30, Poster C
Effect of synthesis method on properties of multiferroic lead iron niobate — •Nicole Bartek, Vladimir Shvartsman, and Doru Lupascu — Institute for Materials Science and Center for Nanointegration (CENIDE), University of Duisburg-Essen, Germany
Lead iron niobate, Pb(Fe0.5Nb0.5)O3 (PFN), belongs to multiferroics. That means that at least two types of ferroic order: ferroelectric and antiferromagnetic, coexist. Dielectric and magnetic properties have been studied in PFN powders, ceramics, and thin films, and the phase transitions from paraelectric (PE) to ferroelectric (FE) at around 380 K and from paramagnetic to antiferromagnetic states at around 140 K are well known. There is a certain scattering of data across literature, related to different methods of preparing PFN ceramics. Our work is focused on the synthesis and characterization of PFN ceramics via different methods and the comparison of their properties. Microstructure was analyzed by using X-ray diffraction and scanning electron microscopy. Electric properties and PE/FE phase transition were studied by dielectric spectroscopy and polarization hysteresis loop measurements. Magnetism and magnetoelectric properties were studied by vibrating sample magnetometry. Optical properties and band gap were investigated through Raman and UV-vis spectroscopy in dependence of temperature.