|
|
Spin wave spectroscopy in ferromagnet-superconductor hybrid structures
Pribytova, Ekaterina ; Davídková, Kristýna (referee) ; Urbánek, Michal (advisor)
Spin wave spectroscopy has emerged as a promising path in the study of ferromagnet-superconductor hybrid structures. These structures exhibit a wide range of spin wave frequencies, spanning from the GHz to the THz regime, making them potential candidates for efficient information transfer without the translational motion of electrons and associated Joule heating. This characteristic positions them as promising candidates for the realization of novel and highly efficient computational concepts. While previous magnonic experiments have predominantly been conducted at room temperature, the growing interest in hybrid systems for quantum computing necessitates the operation of magnonic devices at low temperatures and within the framework of superconducting circuits. The aim of this bachelor's thesis is to explore the possibilities of information transfer using spin waves in ferromagnet-superconductor systems.
|
|
|
Excitation of exchange spin waves using microwave nano antennas
Davídková, Kristýna ; Holobrádek, Jakub (referee) ; Urbánek, Michal (advisor)
The transmission and processing of information could be carried out by utilizing spin waves in the future. Using the possibility of encoding information into the amplitude and wave phase would lead to the acceleration of complex mathematical operations, while for their efficiency it is necessary to work with spin waves in the exchange mode, which are characterized by a short wavelength. However, exchange mode spin waves are not so easy to generate. This bachelor thesis deals with the generation and detection of exchange spin waves, which is performed using lithographically fabricated nanoantennas on the surface of an iron-yttrium garnet magnetic layer. The bachelor thesis also contains analytical calculations of excitation spectra of the generated nanoantennas of different shapes and sizes, whose model is verified by simulations and experiment.
|
|
|
Excitation of exchange spin waves using microwave nano antennas
Davídková, Kristýna ; Holobrádek, Jakub (referee) ; Urbánek, Michal (advisor)
The transmission and processing of information could be carried out by utilizing spin waves in the future. Using the possibility of encoding information into the amplitude and wave phase would lead to the acceleration of complex mathematical operations, while for their efficiency it is necessary to work with spin waves in the exchange mode, which are characterized by a short wavelength. However, exchange mode spin waves are not so easy to generate. This bachelor thesis deals with the generation and detection of exchange spin waves, which is performed using lithographically fabricated nanoantennas on the surface of an iron-yttrium garnet magnetic layer. The bachelor thesis also contains analytical calculations of excitation spectra of the generated nanoantennas of different shapes and sizes, whose model is verified by simulations and experiment.
|
guest ::
