Ferromagnetic resonance study of spintronics materials

The search for the materials useful for spin-based electronics (spintronics) has been a very important part in the developing of spintronics technology and spin-based electronic devices. Organic-based semiconductor ferromagnets are a class of materials which have unique combination of properties suitable for sources or analyzers of spin-polarized currents are being studied by using different techniques as candidates for spintronics applications. Spintronics devices are starting to impact high-technology industries and could create new multibillion dollar industries which we could not always predict.;Ferromagnetic Resonance (FMR) technique along with other experimental methods are used to study a number of ferromagnetic semiconductors to get information about their chemical and crystal structure, surface and bulk properties, main parameters related to the conductivity and spins of the electrons.;This dissertation investigates temperature- and structure-dependent behavior of different generations of magnets V[TCNE]x and VxCo 1-x[TCNE]2 (TCNE is tetracyano-ethylene). The obtained data have been analyzed using famous models for FMR in semi-conductors.