SYNTHESIS AND CHARACTERIZATION OF YMn03 BASED SYSTEMS

Abstract

YMn03 materials have received a lot of attraction due to their multiferroic behaviour. Bulk YMn03 show antiferromagnetic behavior, but some ferromagnetism can be induced in its nanoparticles. Thus YMn03 nanoparticles show spin glass behavior along with exchange bias effect due to the presence of ferromagnetic and anti ferrom agnetic components. Materials exhibiting exchange bias can be utilized in several applications such spin valves, permanent magnets, high density recording media etc. In present work, pure YjGdMnO3 (x0, 0.05) nanoparticles were prepared using solid state reaction method. These samples were then characterized for structural studies using powder X-ray diffraction (XRD) measurements. Energy dispersive X-ray spectrometry (EDS) was used to find the chemical composition of prepared samples. SQUID Magnetometer was used to carry out the magnetic measurements of the samples.YI GdMn03 (x0, 0.05) pellets were prepared, using solid state reaction method, for electrical measurements. These pellets were also characterized by XRD and FE-SEM (field emission microscopy) for their structural study. The dielectric constant of pellets was measured by impendence analyzer. YMn03 thin films were deposited by pulsed laser deposition (PLD) technique at different laser energies and substrate temperatures. These thin films were characterized by XRD, EDS and FE-SEM.