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Development of a Novel Terahertz Magnetic Resonance Spectrometer for Spin Dynamics Investigations
Sojka, Antonín ; Smith, Graham Murray (oponent) ; Tseytlin, Mark (oponent) ; Neugebauer, Petr (vedoucí práce)
During the last decades, the method called High Frequency/Field Electron Paramagnetic Resonance (HF-EPR) spectroscopy experienced a boom in chemistry, biology, material science, and physics. Still, HF-EPR spectrometers operating at sub-THz frequencies are mostly custom-made with non-standard solutions. The thesis aims to develop a novel broadband EPR spectrometer capable of operating in the field and frequency domain and performing frequency domain rapid scan to study relaxation times. The spectrometer operates at high magnetic fields up to 16\,T, broad frequency range from 90 to 1100 GHz, and temperature ranges of 4 –- 400\,K. Furthermore, The work describes the design and development of six different exchangeable sample holders with a proof-of functionality measurement and unique fast-loading flange for the sample holder. The capability of the spectrometer to perform Rapid Scan measurement is demonstrated in the measurements of the LiPc single crystal and the DPPH sample dissolved in toluene.
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Development of a Novel Terahertz Magnetic Resonance Spectrometer for Spin Dynamics Investigations
Sojka, Antonín ; Smith, Graham Murray (oponent) ; Tseytlin, Mark (oponent) ; Neugebauer, Petr (vedoucí práce)
During the last decades, the method called High Frequency/Field Electron Paramagnetic Resonance (HF-EPR) spectroscopy experienced a boom in chemistry, biology, material science, and physics. Still, HF-EPR spectrometers operating at sub-THz frequencies are mostly custom-made with non-standard solutions. The thesis aims to develop a novel broadband EPR spectrometer capable of operating in the field and frequency domain and performing frequency domain rapid scan to study relaxation times. The spectrometer operates at high magnetic fields up to 16\,T, broad frequency range from 90 to 1100 GHz, and temperature ranges of 4 –- 400\,K. Furthermore, The work describes the design and development of six different exchangeable sample holders with a proof-of functionality measurement and unique fast-loading flange for the sample holder. The capability of the spectrometer to perform Rapid Scan measurement is demonstrated in the measurements of the LiPc single crystal and the DPPH sample dissolved in toluene.
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