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High-frequency ESR Spectroscopy of Molecular Magnets
Magnetic molecules are a new class of quantum magnets realizing zero-dimensional systems. They consist of a core with a finite number of magnetically strongly interacting paramagnetic ions. The anisotropy barrier induced by the magnetic core results in bistable ground state of magnetization at low temperature. Moreover, in case of a bistable ground state set, the famous quantum tunneling of the magnetization is observed, one of the very few macroscopic quantum effects in condensed matter. High-frequency ESR Spectroscopy is particularly devoted to investigate such metal-organic materials, i.e. spin state, spin dynamics, anisotropy and spin-orbit coupling, etc. Within the thesis, students will: (1) learn to measure at low-temperatur, to handle ultra-cold liquids, and to operate superconducting magnets withs fields up to 18 Tesla, (2) operate a THz-ESR spectrometer, (3) measure a metal-organic paramagnetic compound, and (4) analyse the results regarding the above-mentioned pyhsical properties.
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