Unique equipment of the Electron Paramagnetic Resonance (EPR) acquired in the SAFMAT laboratory is used for detailed analysis of paramagnetic point defects, trap states and luminescent centers in the bulk single crystals or ceramics, single crystalline thin films but also in nanoparticle materials The EPR laboratory is equipped by highest class spectrometer in its category - Bruker ELEXSYS E580, designed to measure electron paramagnetic (spin) resonance in both modes - continuous wave (CW) and pulsed (FT), both in the most common X-band (9,4-9 8 GHz) and in high-frequency Q-band (34 GHz) frequencies. The flexibility of the system is ensured by a modular architecture that allows operation in CW mode or CW/FT system. In both frequency ranges spectrometer comprises a system for measuring ENDOR (electron nuclear double resonance) and ELDOR (electron-electron double resonance). The spectrometer is equipped with the cryostats allowing measurements in the range 2.8-300 K. The light excitation of samples can be performed with an optical cryostat which allows using various types of lamps or OPO laser generating ns pulses at wavelength interval 210-2700 nm. Using EPR spectroscopy, it is possible to determine the local (in the order of magnitude of the lattice constant) structure and dynamics of the centers and their spatial distribution, possibly also the chemical elements present in their immediate vicinity. It is possible to analyze solids but also liquid or biological samples. EPR experiments are used in the development of optical and scintillation materials, but they are increasingly used also in the study of biological and magnetic materials.
EPR spektrometer Bruker E580