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Wyszukujesz frazę "Michalski, K" wg kryterium: Autor


Wyświetlanie 1-5 z 5
Tytuł:
Comparison of Magnetic and Mössbauer Results Obtained for Palaeozoic Rocks of Hornsund, Southern Spitsbergen, Arctic
Autorzy:
Szlachta, K.
Michalski, K.
Brzózka, K.
Górka, B.
Gałązka-Friedman, J.
Powiązania:
https://bibliotekanauki.pl/articles/1811894.pdf
Data publikacji:
2008-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
91.25.F-
Opis:
This analysis was performed as a part of the palaeomagnetic project focused on the reconstruction of the palaeogeographic position of the Svalbard Archipelago and adjacent crustal units (European Arctic) in the Palaeozoic and Mesozoic. Three rock formations - Cambrian, Devonian and Carboniferous were sampled in the area of Hornsund, southern Spitsbergen. The main aim of the presented study is to identify ferromagnetic minerals (sensu lato) - the carriers of the natural remanent magnetisation in the investigated rocks. A wide range of magnetic methods were used: the Lowrie tests, unblocking temperatures determinations and the measurement of coercivity spectra as well as the Mössbauer studies. In Devonian and Carboniferous samples all applied methods indicate the domination of the hematite natural remanent magnetisation carrier. In Cambrian rocks magnetic measurements reveal a mixture of ferromagnetic (sensu lato) minerals with varying coercivities and unblocking temperatures. The Mössbauer data improve the identification, suggesting that in Cambrian rocks the carrier of the dominating natural remanent magnetisation component is maghemite.
Źródło:
Acta Physica Polonica A; 2008, 114, 6; 1675-1682
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nanoparticles of Ni on Al$\text{}_{2}$O$\text{}_{3}$ Ceramic Powder Coated by Chemical Reactions
Autorzy:
Michalski, J.
Konopka, K.
Trzaska, M.
Powiązania:
https://bibliotekanauki.pl/articles/2035468.pdf
Data publikacji:
2002-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.63.Bd
81.07.Wx
81.16.-c
61.46.+w
Opis:
Ceramic-metal composites are usually prepared by sintering ceramic with metal or metal oxide powders. An alternative technique is sintering ceramic powders coated by metal film. In the present study, the Ni coated Al$\text{}_{2}$O$\text{}_{3}$ powder was obtained by chemical reduction reaction. We used the phosphate bath for deposition of nickel-phosphorus on the surface of Al$\text{}_{2}$O$\text{}_{3}$ powder. The thickness and chemistry of Ni-P coating depend on the time and the parameters of the reaction process. Particles of Ni-P precipitate from a solution in two different forms: (a) spherical nanoparticles of Ni-P (50 nm) which grow on the surface of Al$\text{}_{2}$O$\text{}_{3}$ powder and can form tight, one diameter thick film; (b) large agglomerates of loosely connected spherical nanoparticles with a 50÷150 nm diameter. The method proposed in this study allows obtaining Al$\text{}_{2}$O$\text{}_{3}$ powder covered with Ni-P nanoparticles in the forms of thin film or single nanoparticles, mixed with loose Ni-P agglomerates.
Źródło:
Acta Physica Polonica A; 2002, 102, 2; 181-186
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Nb Addition on Magnetic Properties of the Nanocrystalline $(Nd₁₀Fe₆₇B₂₃)_{100-x}Nbₓ$ (where x = 1, 2, 4) Alloy Ribbons
Autorzy:
Szwaja, M.
Pawlik, K.
Pawlik, P.
Gębara, P.
Michalski, B.
Powiązania:
https://bibliotekanauki.pl/articles/1387907.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.20.En
75.75.-c
75.75.Cd
Opis:
In the present work the magnetic properties and phase constitution of $(Nd₁₀Fe₆₇B₂₃)_{100-x}Nbₓ$ (where x = 1, 2, 4) alloys in the form of ribbons were investigated. The base alloys were prepared by arc-melting the high purity elements with pre-alloyed Fe-B under an Ar atmosphere. The ribbon samples were obtained by controlled atmosphere melt-spinning technique. In order to generate the nanocrystalline microstructure and hard magnetic properties, samples were annealed at various temperatures (from 923 K to 1023 K) for 5 min. The aim of the present work was to determine the influence of Nb admixture and annealing conditions on the phase constitution and magnetic properties.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 623-625
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Ga Addition on Structure and Magnetic Properties of the $LaFe_{11.14}Co_{0.66}Si_{1.2-x}Ga_{x}$ (x=0.1, 0.2, 0.3) Alloys
Autorzy:
Gębara, P.
Pawlik, P.
Michalski, B.
Wysłocki, J.
Kotynia, K.
Powiązania:
https://bibliotekanauki.pl/articles/1402328.pdf
Data publikacji:
2015-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Sg
75.50.Bb
Opis:
In the present work, the phase constitution and magnetic properties of the $LaFe_{11.14}Co_{0.66}Si_{1.2-x}Ga_{x}$ (where x=0.1, 0.2, 0.3) alloys, were investigated. It was revealed that increase of Ga content in the alloy composition causes the rise of lattice parameter of the $La(Fe,Si)_{13}$-type phase, which causes increase of the Curie temperature. However, the increase of Ga addition leads to decrease of magnetocaloric effect.
Źródło:
Acta Physica Polonica A; 2015, 128, 1; 87-90
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crystalline Structure of Potassium Holmium Double Tungstate
Autorzy:
Borowiec, M.
Dyakonov, V.
Woźniak, K.
Dobrzycki, Ł.
Majchrowski, A.
Michalski, E.
Zubov, E.
Khatsko, E.
Zayarnyuk, T.
Szewczyk, A.
Gutowska, M.
Rykova, A.
Barański, M.
Domukhovski, V.
Shtyrkhunova, V.
Iwanowski, P.
Żmija, J.
Szymczak, H.
Powiązania:
https://bibliotekanauki.pl/articles/1505085.pdf
Data publikacji:
2011-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.66.Fn
Opis:
The potassium holmium double tungstate was prepared by using top seeded solution growth technique. Structural investigations have been performed at room temperature. The $KHo(WO_4)_2$ single crystal belongs to the monoclinic space group C2/c with the unit-cell parameters: a = 10.624(2) Å, b = 10.352(2) Å, c = 7.5434(15) Å, β = $130.78(3)^{o}$, and Z = 4. The atomic coordinates, isotropic and anisotropic displacement parameters and interionic distances for the studied structure were determined.
Źródło:
Acta Physica Polonica A; 2011, 119, 6; 835-837
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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