EFFECT OF POLYDISPERSITY ON THE MAGNETIC PROPERTIES OF ORDERED 2D ARRAYS OF FERRITE NANOPARTICLES
Jana Röschlová - Martin Weis - Július Cirák - Akihiko Nishida - Július Dekan - Dimitris Petridis - Alexander Šatka
The construction of novel nanostructured materials attracts much attention in materials research due to possibilities for contributions in low-dimensional research and/or in potential technological applications. In this communication we present the formation of ordered arrays of γ-ferrite nanoparticles (NP) by the Langmuir-Blodgett technology (layer-by-layer deposition) and characterization of the magnetic properties by Mössbauer spectroscopy and vibrational magnetometry. The effect of a non-ideal dispersion of particle size on the phase transition from superparamagnetic to ferromagnetic state of the 2D nanoparticle system is discussed from the viewpoint of potential applications.
Keywords: ferrite nanoparticles, Langmuir-Blodgett films, polydisperse nanoparticle system, Mössbauer spectroscopy, vibrating sample magnetometer