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Wyszukujesz frazę "Dębicki, B." wg kryterium: Autor


Wyświetlanie 1-5 z 5
Tytuł:
Magnetisation and hydrogenation of Mg/Ni multilayers
Autorzy:
Pacanowski, S.
Marczyńska, A.
Dawczak-Dębicki, H.
Jabłoński, B.
Szymański, B.
Smardz, L.
Powiązania:
https://bibliotekanauki.pl/articles/1048263.pdf
Data publikacji:
2018-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.Cn
61.10.Nz
Opis:
In this contribution we have studied magnetisation of Mg/Ni multilayers (MLs) to characterise the alloing effect near interfaces. The layered structure was characterised by standard X-ray diffraction. The MLs were deposited by UHV magnetron sputtering onto naturally oxidised Si(100) substrates. Results showed, that due to Mg-Ni alloy formation near interfaces the magnetizations of the MLs were strongly reduced. Effective "dead" Ni layer thickness was estimated as 1.2 nm at room temperature (RT). Furthermore, hydrogen absorption kinetics at a pressure of about 1000 mbar was studied at RT in Pd covered Mg/Ni MLs using four-point resistivity measurements. Results showed that the fastest initial rise in resistance in the first 9 s was observed for d_{Ni}=3.5 nm.
Źródło:
Acta Physica Polonica A; 2018, 133, 3; 617-619
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Valence Band Modifications on Hydrogen Absorption in Zr-Pd Alloy Thin Films
Autorzy:
Jabłoński, B.
Pacanowski, S.
Werwiński, M.
Marczyńska, A.
Dawczak-Dębicki, H.
Szajek, A.
Smardz, L.
Powiązania:
https://bibliotekanauki.pl/articles/1030742.pdf
Data publikacji:
2018-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.22.-f
82.80.Pv
Opis:
We study the valence band modifications of in-situ prepared nano- and polycrystalline Pd-Zr alloy thin films using X-ray photoelectron spectroscopy. Results were compared with valence bands calculated by ab initio methods. Furthermore, hydrogen absorption and desorption kinetics under pressure of about 570 mbar were studied in Pd covered nanocrystalline ZrPd₂ alloy thin film. Results showed that modifications of the valence band of the nanocrystalline alloy thin film could significantly influence on hydrogen absorption and desorption process.
Źródło:
Acta Physica Polonica A; 2018, 133, 3; 620-623
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exchange coupling effects in naturally oxidised ultrathin iron film
Autorzy:
Dawczak-Dębicki, H.
Marczyńska, A.
Rogowska, A.
Wachowiak, M.
Nowicki, M.
Pacanowski, S.
Jabłoński, B.
Czajka, R.
Smardz, L.
Powiązania:
https://bibliotekanauki.pl/articles/1050673.pdf
Data publikacji:
2018-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.-i
75.70.Kw
Opis:
Oxidation process of Fe films under atmospheric conditions is depth limited such that an oxide covering layer with a well-defined thickness is formed by which the underlying metal is prevented from further oxidation. Iron thin film with an initial thickness d_{i}=4 nm was deposited onto 1.6 nm - V(110) buffer layer using UHV magnetron sputtering. The planar growth of Fe oxides was revealed by atomic force microscopy. X-ray photoelectron spectroscopy studies performed after 250 days of oxidation revealed formation of a hematite (α-Fe₂O₃) ultrathin film on the metallic rest of iron. Furthermore, low temperature magnetic measurements of the oxidised Fe ultrathin film revealed an exchange anisotropy which is imposed to the metallic rest. As a result, we have observed at low temperatures a shift and broadening of the hysteresis loops due to the exchange interaction at the metal-oxide interface.
Źródło:
Acta Physica Polonica A; 2018, 133, 3; 601-604
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preparation and Characterisation of Fe/Ce Multilayer
Autorzy:
Dawczak-Dębicki, H.
Marczyńska, A.
Pacanowski, S.
Szymański, B.
Majchrzycki, Ł.
Kowalski, W.
Grembowski, W.
Bilski, T.
Smardz, L.
Powiązania:
https://bibliotekanauki.pl/articles/1030530.pdf
Data publikacji:
2018-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.-i
68.55.-a
Opis:
Ce/Fe multilayer (ML) with constant Fe (2 nm) and Ce (4.5 nm) sublayer thicknesses was prepared onto naturally oxidised Si(100) substrate using magnetron sputtering. Chemical purity of the sublayers was revealed in-situ by X-ray photoelectron spectroscopy (XPS) measurements. The structure of the sample was studied by standard low- and high-angle X-ray diffraction (XRD). Surface morphology of the ML was examined by atomic force microscopy. Magnetic properties of the sample was studied in the temperature range between 5 and 350 K using a vibrating sample magnetometer in a magnetic field up to 9 T. The hysteresis loops were measured in field perpendicular and parallel to the substrate. Furthermore, hydrogen absorption at a pressure of about 1000 mbar was studied at room temperature (RT) in Pd covered ML using four-point resistivity measurements. The solid state amorphisation reaction have been confirmed by XRD and magnetic measurements of the Ce/Fe ML. The absence of satellite peaks in the low - angle XRD pattern revealed no artificial layered structure. The above results show that interdiffusion of cerium and iron atoms is extremely fast at RT.
Źródło:
Acta Physica Polonica A; 2018, 133, 3; 628-631
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Natural xidation of thin Fe films on V buffer layer
Autorzy:
Dawczak-Dębicki, H.
Marczyńska, A.
Rogowska, A.
Wachowiak, M.
Nowicki, M.
Pacanowski, S.
Jabłoński, B.
Kowalski, W.
Grembowski, J.
Czajka, R.
Smardz, L.
Powiązania:
https://bibliotekanauki.pl/articles/1055062.pdf
Data publikacji:
2017-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.-i
68.55.-a
Opis:
We have studied oxidation kinetics of Fe thin film under atmospheric conditions using the fact that metallic iron is a ferromagnet but ultrathin natural iron oxides are approximately nonmagnetic at room temperature. As a consequence, oxidation is associated with a loss in total Fe magnetic moment. Results show that the sample with an initial Fe thickness equal to 10 nm oxidize relatively fast (time constant τ=0.05 day), whereby a constant amount of 2.5 nm of metal is transformed into oxides. For lower iron initial thickness (d_{i}=4 nm) the time constant for oxidation significantly increases reaching a value of 2 days. Furthermore, X-ray photoelectron spectroscopy studies performed after 144 days of oxidation revealed formation of hematite (α-Fe₂O₃) thin film on the metallic rest of iron.
Źródło:
Acta Physica Polonica A; 2017, 132, 4; 1272-1276
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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