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Design of a Non-Resonant General Purpose Sample Holder for Terahertz Electron Paramagnetic Resonance Spectroscopy
Martínek, Tomáš ; Sojka, Zbigniew (oponent) ; Neugebauer, Petr (vedoucí práce)
The aim of this diploma thesis is to design dedicated sample holders for a high-frequency electron paramagnetic resonance spectroscopy. The main task deals with the development of a user-friendly and fast locking system for connection between microwave waveguide and a sample holder. Two types of sample holders are designed one for loading multiple samples and one for single crystal rotation. Thanks to loading up to 6 samples the overall measurement time is estimated to be reduced more than twice. In the case of the single crystal rotator based on the precise piezoelectric rotator with resistive encoder a milliradian, precision is provided. Both sample holders are designed in such a way that the full automatization can be applied in the measurement.
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Design of the far-infrared spectrometer coupling to a superconductive magnet and magneto-optical measurements in the far-infrared region
Dubnická Midlíková, Jana ; Slageren, Joris van (oponent) ; Neugebauer, Petr (vedoucí práce)
The thesis deals with the development of the far-infrared (FIR) spectroscopy in the high magnetic field. The combination of the FIR spectroscopy and high magnetic field is a very important tool in the characterization of materials such as Single-Molecule Magnets (SMMs). It also presents an ideal experimental technique that can probe and elucidate properties of novel 2D materials. The FIR spectroscopy in the magnetic field also allows studying Electron Paramagnetic Resonance (EPR) of SMMs with very large zero-field splitting, mainly based on transition metal complexes or lanthanides, in which commonly used EPR systems do not provide experimental access to the magnetic resonance transitions. In the thesis, two setups of the FIR spectrometers coupled to the superconductive magnets are described in detail. The first described setup, located at the University of Stuttgart, is already assembled and its performance is discussed. The magneto-optical measurements of SMMs performed on this setup are presented. The second magneto-optical setup draws on the experiences gained in the first setup and is designed for CEITEC.
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Design of a Non-Resonant General Purpose Sample Holder for Terahertz Electron Paramagnetic Resonance Spectroscopy
Martínek, Tomáš ; Sojka, Zbigniew (oponent) ; Neugebauer, Petr (vedoucí práce)
The aim of this diploma thesis is to design dedicated sample holders for a high-frequency electron paramagnetic resonance spectroscopy. The main task deals with the development of a user-friendly and fast locking system for connection between microwave waveguide and a sample holder. Two types of sample holders are designed one for loading multiple samples and one for single crystal rotation. Thanks to loading up to 6 samples the overall measurement time is estimated to be reduced more than twice. In the case of the single crystal rotator based on the precise piezoelectric rotator with resistive encoder a milliradian, precision is provided. Both sample holders are designed in such a way that the full automatization can be applied in the measurement.
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Design of the far-infrared spectrometer coupling to a superconductive magnet and magneto-optical measurements in the far-infrared region
Dubnická Midlíková, Jana ; Slageren, Joris van (oponent) ; Neugebauer, Petr (vedoucí práce)
The thesis deals with the development of the far-infrared (FIR) spectroscopy in the high magnetic field. The combination of the FIR spectroscopy and high magnetic field is a very important tool in the characterization of materials such as Single-Molecule Magnets (SMMs). It also presents an ideal experimental technique that can probe and elucidate properties of novel 2D materials. The FIR spectroscopy in the magnetic field also allows studying Electron Paramagnetic Resonance (EPR) of SMMs with very large zero-field splitting, mainly based on transition metal complexes or lanthanides, in which commonly used EPR systems do not provide experimental access to the magnetic resonance transitions. In the thesis, two setups of the FIR spectrometers coupled to the superconductive magnets are described in detail. The first described setup, located at the University of Stuttgart, is already assembled and its performance is discussed. The magneto-optical measurements of SMMs performed on this setup are presented. The second magneto-optical setup draws on the experiences gained in the first setup and is designed for CEITEC.
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