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National Repository of Grey Literature 13 records found  previous11 - 13  jump to record: Search took 0.00 seconds. 
Characterization of spectrograph with CCD camera
 Vyvlečka, Michal ; Němec, Petr (advisor) ; Zahradník, Martin (referee)
1 Title: Characterization of spectrograph with CCD camera Author: Michal Vyvlečka Department: Department of Chemical Physics and Optics Supervisor: doc. RNDr. Petr Němec, Ph.D. Abstract: This work is focused on the determination of parameters of a CCD camera DU420A-OE and a spectrograph SR303i-A, which were bought in summer 2014 to the laboratory of Opto Spintronics at the Charles university in Prague. The first chapter includes a short description of CCD detection and focuses itself on a classification of noise affecting spectroscopy measurements and possibilities of its elimination. The second chapter includes the description and the results of measurements of the properties of the CCD camera and the spectrograph. The emphasis is put on the measurements of influence of various parameters and conditions for measuring the signal to noise ratio and on finding the optimal configuration for measuring weak signals, which means that the results of this work can be generalized for all the spectroscopic measurements in which CCD cameras are used as detectors. Keywords: CCD camera, spectroscopy, dark noise, readout noise
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Magnetooptical spectroscopy of La2/3Sr1/3MnO3 ultrathin films
 Zahradník, Martin ; Veis, Martin (advisor) ; Postava, Kamil (referee)
High quality La2/3Sr1/3MnO3 (LSMO) ultrathin layers are of interest for applications in magnetic sensors and spintronic devices due to colossal magnetoresistance of these materials. LSMO films studied in this thesis were grown by pulsed laser deposition on SrTiO3 substrates. The deposition at low oxygen pressures with the use of a beam homogenizer leads to the high quality LSMO films. The film thickness ranges from 5,0 to 103,9 nm. Magnetooptical (MO) spectrometer based on azimuth modulation was used and spectra of MO Kerr effect in polar and longitudinal configuration were obtained. All the spectra display features typical for LSMO films, including the thinnest 5 nm thick film. MO Kerr effect observed in this film reflects high magnetic ordering even at such low thickness. All the spectra manifest high quality of the LSMO films prepared with the use of the beam homogenizer.
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Metodika analýzy aktérů
 Zahradník, Martin ; Dlouhá, Jana
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National Repository of Grey Literature : 13 records found   previous11 - 13  jump to record:
See also: similar author names
1 Zahradník, Marcel
3 Zahradník, Matěj
6 Zahradník, Michal
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