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Wyszukujesz frazę "Stachowicz, Marcin" wg kryterium: Autor


Tytuł:
Spektroskopowe badania domieszkowanych erbem warstw epitaksjalnych GaN, InGaN i struktur GaN : Er/AIN
Spektroskopowe badania domieszkowanych erbem warstw epitaksjalnych GaN, InGaN i struktur Ga:N /Er/AIN
Autorzy:
Stachowicz, Marcin
Współwytwórcy:
Kozanecki, Adrian (promotor)
Kozanecki, Adrian (supervisor)
Wydawca:
Institute of Physics of the Polish Academy of Science
Instytut Fizyki Polskiej Akademii Nauk
Powiązania:
s. 129-136
p. 129-136
Opis:
143 p. : il. : 30 cm
143 strony : il. : 30 cm
Dostawca treści:
RCIN - Repozytorium Cyfrowe Instytutów Naukowych
Książka
Tytuł:
Ba-Fe titanates in Peralkaline granite of the Ilímaussaq Complex, South Greenland
Autorzy:
Cegiełka, Małgorzata
Bagiński, Bogusław
Macdonald, Ray
Marciniak-Maliszewska, Beata
Stachowicz, Marcin
Tematy:
Ilímaussaq peralkaline granite
henrymeyerite
low-Fe Ba Titanate
granit
minerały
kryształy
tytanian baru
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/2023983.pdf  Link otwiera się w nowym oknie
Opis:
A peralkaline granite of the Ilímaussaq Complex, South Greenland, contains the rare mineral henrymeyerite [(Ba0.92Na 0.05Ca0.03) 1.0(Ti6.87Fe2+1.04Nb 0.03)7.9O 16], a low-Fe Ba titanate [(Ba0.74 Ca0.02Na 0.05) 0.8 (Ti4.9o Fe2+0.15Nb 0.04)5.1O 11], and an unidentified Ba titanosilicate. Both titanates show the coupled substitution 2Na+ + Si4+→ Ba2+ + Ti4+. The minerals are present as tiny crystals fringing ilmenite inclusions in an amphibole crystal and are thought to have formed during the hydrothermal stage of the granite’s evolution.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deynekoite, Ca9□Fe3+(PO4)7 – a new mineral of the merrillite group from phosphide-bearing contact facies of paralava, Hatrurim Complex, Daba-Siwaqa, Jordan
Autorzy:
Galuskin, Evgeny
Woźniak, Krzysztof
Zieliński, Grzegorz
Galuskina, Irina
Stachowicz, Marcin
Vapnik, Yevgeny
Murashko, Mikhail
Wydawca:
Cambridge University Press
Cytata wydawnicza:
Galuskin, E.V. et al. (2023) ‘Deynekoite, Ca9□Fe3+(PO4)7 – a new mineral of the merrillite group from phosphide-bearing contact facies of paralava, Hatrurim Complex, Daba-Siwaqa, Jordan’, Mineralogical Magazine, 87(6), pp. 943–954. doi:10.1180/mgm.2023.71.
Opis:
Deynekoite, Ca9☐Fe3+(PO4)7 (R3c, a = 10.3516(3)Å, c = 37.1599(17)Å, V = 3448.4(3)Å3, Z = 6), a new mineral of the merrillite group was found in a contact facies of paralava of the Hatrurim Complex in the Daba-Siwaqa pyrometamorphic rock field, Jordan. The paralava, consisting of diopside, tridymite, anorthite, wollastonite and fluorapatite, is enriched in Fe-bearing phosphides and phosphates at the contact with the altered country rock. Cristobalite overgrowing tridymite has a texture of the fish scales-type indicating that temperature of paralava could have reached 1500C. Deynekoite with empirical formula (Ca8.90Na0.11K0.02)9.03(Fe3+0.62 Mg0.30Al0.05)0.97P6.98V5+0.05O27.70(OH)0.30 forms transparent, light-yellow or light-brown grains up to 30-40 m in size. Microhardness of deynekoite VHN25 = 319(29) kg/mm2, that coresponds to the Mohs hardness = 4.5. Its density was calculated as 3.09 g·cm-3 on the basis of its empirical composition and structural data. Deynekоite is uniaxial (−), its refractive indices are ω = 1.658(3), ε = 1.652(3) (λ = 589 nm), and pleochroism is not observed. The formation of phosphides on the boundary of the paralava and country rock is connected with carbothermal reductive reactions and realized at temperatures above 1300С. With decreasing temperature and increasing oxygen activity, phosphides are replaced by Fe2+-bearing phosphates. Deynekoite, which contains Fe3+ (substituting for Fe2+-phosphates) and a small amount of water, formed at temperatures of 600–800C.
National Science Center of Poland Grant (grant number 2021/41/B/ST10/00130).
Dostawca treści:
Repozytorium Centrum Otwartej Nauki
Artykuł
Tytuł:
Optimization of MBE-grown GaSb buffer on GaAs substrates for infrared detectors
Autorzy:
Jarosz, Dawid
Bobko, Ewa
Trzyna-Sowa, Małgorzata
Przeździecka, Ewa
Stachowicz, Marcin
Ruszała, Marta
Krzemiński, Piotr
Juś, Anna
Maś, Kinga
Wojnarowska-Nowak, Renata
Nowak, Oskar
Gudyka, Daria
Tabor, Brajan
Marchewka, Michał
Tematy:
gallium arsenide
gallium antimonide
molecular beam epitaxy
heteroepitaxy
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Powiązania:
https://bibliotekanauki.pl/articles/59112887.pdf  Link otwiera się w nowym oknie
Opis:
The aim of this work was to improve the quality of the GaSb buffer layers on GaAs substrates using the molecular beam epitaxy (MBE) technology. The high quality of the GaSb buffer layers is one of the most important elements enabling the synthesis of good quality of type- II superlattices (T2SL) structures for infrared applications. The main challenges in this regard are: compensation of the difference in lattice constants between GaAs and GaSb and obtaining the highest achievable surface quality of the final GaSb layer. In the literature, many authors describe different techniques to obtain the best quality of a GaSb buffer layer. In this work, we present the results of HRXRD, AFM, TOF-SIMS, SEM, and Nomarski optical microscope measurements obtained for 2 μm thick GaSb buffer layers. The GaSb layers are made according to different techniques and these results are compared with a GaSb buffer construction technique according to our own technology. During the processes, we also obtained an unintentional structure of one of the buffer layers, which allowed us to obtain very good results in terms of surface structure and crystallographic quality where FWHM in 𝜔𝑅𝐶 scan was equal to 138 arcsec and RMS 0.20 nm proving that there is still a lot of work to be done in this area.
Dostawca treści:
Biblioteka Nauki
Artykuł

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