National Repository of Grey Literature 76 records found  1 - 10nextend  jump to record: Search took 0.02 seconds. 
Alternative approach to the hysteresis of transport current in Bi-based tapes
Nálevka, Petr ; Jirsa, Miloš ; Koblischka, M. R. ; Pan, V. M. ; Dew-Hughes, D. ; Huang, S. L.
The induced critical currents and the reversible magnetic moment were studied in Bi-based samples prepared by different technologies, in a wide range of temperatures and external magnetic fields.
Chracterisation of the magnetisation hysteresis in RE-123 superconductors by exponentially decaying and power-law functions
Jirsa, Miloš ; Koblischka, M. R. ; Higuchi, T. ; Murakami, M.
The fully developed fishtail shape of the magnetization hysteresis loops in untwined RE-123 bulk materials is well characterized by the logarithmic pinning potential U(j) in frames of the thermally actived pinning process.
[Mechanismus vzniku spontánně tvořených nanostruktůr při heteroepitaxy
Kotrla, Miroslav ; Volkmann, T. ; Much, F. ; Biehl, M.
We briefly review the recent results on formation of self-assembled nanostructures during heteroepitaxy of immiscible metals. The methods of microscopic modelling of multicomponent growth are described. Results of simulation of self-assembled structures with alternating strips using both lattice and off-lattice atomistic models are presented.
Efekt adsorbátů na submonovrstvový epitaxní růst
Kotrla, Miroslav
The influence of impurities on submonolayer growth is briefly summarized. Illustrative results of STM experiment and numerical simulations are presented. It is shown that when not noticed, effects of impurities may cause an incorrect evaluation of measurements of adatom diffusion.
Ultrasound and electromagnetic rapid tests of modification effect spheroidal or vermicular graphite cast irons manufacturing
Skrbek, B. ; Nosek, V. ; Tomáš, Ivan ; Stupakov, Oleksandr
Measurement of speed of sound in a wedge samople immediately after the eutectic reaction is finished. Measurement of electric resistance of a ring sample during the eutectic reaction. Outlook for magnetic tests.
Vlastnosti vertikálně uspořádaných struktur kvantových teček
Hospodková, Alice ; Kuldová, Karla ; Hulicius, Eduard ; Oswald, Jiří ; Pangrác, Jiří
We have studied the overlap of electron wave functions of stacked QDs. We have found that for sample with the spacer thickness 15 nm the electron wave functions of QDs in stack are fully separated. We have found that for spacer thickness around 7 nm the electron wave functions of smaller QDs from deeper layers still overlap while the electron wave function of bigger QDs at top layers remain separated.
Strmé InAs/GaAs heteropřechody a velmi tenké kvantové jámy vypěstované pomocí MOVPE
Hulicius, Eduard ; Pacherová, Oliva ; Oswald, Jiří ; Hospodková, Alice ; Pangrác, Jiří ; Šimeček, Tomislav ; Melichar, Karel ; Petříček, Otto ; Chráska, T. ; Holý, V. ; Vávra, I. ; Ouattara, L.
We have found that the abruptness and symmetry on monoatomic scale is achievable with MOVPE technique as well. We are able to find only the periodicity in these structures while atomic resolution pictures give reliable thickness values.
Negibbovská stacionární elektronová distribuce v kvantových tečkách
Král, Karel ; Zdeněk, Petr
Experiments on relaxation and optical electronic properties of quantum dots are reviewed and conclusions are outlined on the use of Gibbs grand-canonical distribution in these structures
Fázový diagram proudění supratekutého helia
Skrbek, Ladislav
The possibility of existence of the flow phase diagram for the helium superfluids is discussed based on the available experimental data.
Druhý zvuk - nástroj pro studium stability proudění He II
Chagovets, T. ; Rotter, M. ; Skrbek, Ladislav
Second Sound is described as a suitable probe for investigation of stability of He II flow.

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