Laboratory Website : lab20.infim.ro
Head of Laboratory : Dr. Victor Kuncser
The laboratory is devoted to research in the field of materials with magnetic or superconducting properties and related electronic phenomena. The research process covers all the steps from preparation (powder, bulk, ribbons, thin films or nanostructures), going through basic physical characterizations, and ending with in-depth analysis of the magnetic dependent and superconducting properties. The laboratory is composed by two groups of specific activities related to electronic correlations and magnetism and respectively, superconductivity. As main research directions are to be mentioned: size effects and interactions in nanoparticulate systems and nanocomposites, interfacial interactions and surface electronic/spin configurations in layered nanosystems, molecular magnets, phase transitions and electron correlations in functional materials, vortex dynamics in high-Tc superconductors, MgB2 for practical applications, composite superconductors, exotic superconductors (iron-based pnictides, non-centro-symmetric superconductors). The presently available experimental facilities allow the complex processing and investigation of the mentioned systems as well as the understanding the basic interaction mechanisms at the microscopic level, by using first principles atomistic modeling and simulation of materials within the Density Functional Theory (DFT) framework, on specially assigned computer clusters.
The magnetic and superconducting structures are prepared by various technologies, like mechanical attrition, melt spinning, microwave annealing, spark plasma & hot press sintering, radiofrequency sputtering, chemical routes, etc. Subsequent processing via thermal treatments (assisted or not by applied magnetic fields) or via gas reaction control can be also managed.
The structural and morphological characterization of the samples and a large field of magnetic, thermodynamic and transport properties are studied by Physical Properties and Magnetic Properties Measurement systems (PPMS, MPMS-SQUID), Vibrating Sample and Magneto-Optic Kerr effect magnetometry (VSM and MOKE), DSC/DTA as well as Laser Flash Calorimetry. The declared purpose of understanding and controlling the electronic phenomena and spin configurations is enhanced by the whole range of Mössbauer spectroscopies (the only institute in Romania), from temperature /field dependent Mossbauer spectroscopy, to the surface/ interface sensitive Conversion Electron Mössbauer Spectroscopy (CEMS).