|
|
Magneto-optical properties of ferrimagnetic garnet thin films with perpendicular magnetic anisotropy
Šetina, Jan ; Veis, Martin (advisor) ; Zázvorka, Jakub (referee)
The aim of this bachelor thesis is to optically and magnetooptically characterize terbium iron garnet and determine its compensation temperature. Another goal is to study magnetooptical response of bismuth doped iron garnets. This analysis was done by magnetooptical spectroscopy, which is suitable for study of thin films due to its high sensitivity and contactlessness. The experimental setup, which allows temperature dependent magnetooptical measurements, was developed and used in the thesis. The spectra of optical constants were deduced using spectroscopic ellipsometer. Hysteresis loop and Faraday rotation was measured on selected sample. These measurements provided new interesting insights in the materials properties, which are discussed in this thesis. 1
|
|
|
Optická a magnetooptická spektroskopie ultratenkých vestev ferimagnetických granátů
Šetina, Jan ; Veis, Martin (advisor) ; Zahradník, Martin (referee)
The aim of this master thesis is to prepare and systematically characterize two groups of ultra-thin films of iron garnets with different compositions and deposition conditions. The first set consists of approximately 10 nm thick samples of gallium-doped yttrium-iron garnet on gadolinium gallium garnet (Gd3Ga5O12) (GGG) substrates with different crys- tallographic orientations and different annealing temperatures. The second group con- tains gallium-bismuth-doped neodymium-iron garnet on GGG substrates. These samples have different thicknesses, the concentration of individual elements and different annealing temperatures. All samples were prepared by the metal-organic decomposition method. The analysis of their physical properties was done by magneto-optical Kerr effect (MOKE) and optical experiments. Specifically, MOKE spectroscopy, Faraday hystere- sis loops measurements and spectroscopic ellipsometry. Obtained experimental results were further used to deduce the spectral dependence of complete permittivity tensor. Its spectral dependence was than discussed with relation to the electronic structure of in- vestigated materials which helped to select the best deposition conditions and substrate orientation. 1
|
|
|
Magneto-optical properties of ferrimagnetic garnet thin films with perpendicular magnetic anisotropy
Šetina, Jan ; Veis, Martin (advisor) ; Zázvorka, Jakub (referee)
The aim of this bachelor thesis is to optically and magnetooptically characterize terbium iron garnet and determine its compensation temperature. Another goal is to study magnetooptical response of bismuth doped iron garnets. This analysis was done by magnetooptical spectroscopy, which is suitable for study of thin films due to its high sensitivity and contactlessness. The experimental setup, which allows temperature dependent magnetooptical measurements, was developed and used in the thesis. The spectra of optical constants were deduced using spectroscopic ellipsometer. Hysteresis loop and Faraday rotation was measured on selected sample. These measurements provided new interesting insights in the materials properties, which are discussed in this thesis. 1
|
guest ::
