Autor: Olszewski, P. K. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Effect of Annealing in Multicomponent bcc Alloys
Autorzy:: Szymański, K.
Perzyńska, K.
Satuła, D.
Dobrzyński, L.
Zaleski, P.
Waliszewski, J.
Rećko, K.
Biernacka, M.
Olszewski, W.
Powiązania:: https://bibliotekanauki.pl/articles/1506614.pdf
Data publikacji:: 2011-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.20.Be
76.80.+y
61.05.Qr
61.50.Ks
81.30.Hd
Opis:: Multicomponent single phase alloys were synthesized according to the idea of iron-average atom system. X-ray diffraction shows formation of bcc phase and traces of unidentified phase. Mössbauer spectra indicate presence of two components with different hyperfine magnetic field distributions. The high field component corresponds to the majority ferromagnetic phase. Few per cent of iron builds low field component. The dominant effect of annealing consists in an increase of the low field component.
Źródło:: Acta Physica Polonica A; 2011, 119, 1; 62-64
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Electrochemical Deposition of Nanowires in Porous Alumina
Autorzy:: Kalska-Szostko, B.
Brancewicz, E.
Mazalski, P.
Sveklo, J.
Olszewski, W.
Szymański, K.
Sidor, A.
Powiązania:: https://bibliotekanauki.pl/articles/1809497.pdf
Data publikacji:: 2009-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 82.45.-h
62.23.Hj
82.45.Qr
81.07.-b
75.75.+a
Opis:: Electrochemical deposition is a very efficient method for producing many types of modern materials. The method is not expensive and does not have a limit for sample size. In our work the preparation of Ni, Co and Fe nanowires is presented. The obtained nanowires had different diameter and length which were tunable by template porous material and time of deposition, respectively. The quality of the prepared wires was dependent also on deposition mode. The smallest wires of the diameter around 40 nm were prepared in porous anodic alumina oxide obtained from oxalic acid. The largest ones, around 120 nm, were produced in phosphoric acid. The length could be as large as the thickness of the oxide and reached up to about 1 μm. The morphology of wires was studied by atomic force microscopy and scanning electron microscopy. The magnetic characterization was done with usage of magnetic force microscopy and the Mössbauer spectroscopy. The wires show magnetization along their growth direction.
Źródło:: Acta Physica Polonica A; 2009, 115, 2; 542-544
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Effect of dielectric medium anisotropy on the polarization degree of emission from a single quantum dash
Autorzy:: Mrowiński, P.
Tarnowski, K.
Olszewski, J.
Somers, A.
Kamp, M.
Höfling, S.
Reithmaier, J.
Urbańczyk, W.
Misiewicz, J.
Machnikowski, P.
Sęk, G.
Powiązania:: https://bibliotekanauki.pl/articles/1159588.pdf
Data publikacji:: 2016-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.67.Hc
71.35.-y
78.55.-m
Opis:: Excitonic emission from single InAs/InGaAlAs/InP quantum dashes has been investigated in the context of degree of linear polarization by post-growth modification of its surrounding dielectric medium. We present optical spectroscopy measurements on a symmetric squared pedestal structures (mesas), and asymmetric rectangular ones oriented parallel or perpendicular to the main in-plane axis of the dashes [1-10]. Polarization resolved microphotoluminescence shows a significant quantitative modification of the degree of linear polarization value from -20% up to 70%. These results have been confronted with calculations of the coupling between the exciton transition dipole moment and electromagnetic field distributed in the vicinity of a quantum dash inside a processed mesa.
Źródło:: Acta Physica Polonica A; 2016, 129, 1a; A-48-A-52
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Thermal Stability and Crystallization οf Iron and Cobalt - Based Bulk Amorphous Alloys
Autorzy:: Olszewski, J.
Zbroszczyk, J.
Sobczyk, K.
Ciurzyńska, W.
Brągiel, P.
Nabiałek, M.
Świerczek, J.
Hasiak, M.
Łukiewska, A.
Powiązania:: https://bibliotekanauki.pl/articles/1811616.pdf
Data publikacji:: 2008-12
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.Kj
75.50.Bb
76.80.+y
Opis:: Microstructure by the Mössbauer spectroscopy and approach to magnetic saturation in the bulk amorphous $Fe_{61}Co_{10}Me_7Y_2B_{20}$ ($Me_7$=$Y_7$, $Y_6Ti_1$ or $Zr_{2.5}Hf_{2.5}W_2$) alloys are investigated. The bulk amorphous $Fe_{61}Co_{10}Zr_{2.5}Hf_{2.5}W_2Y_2B_{20}$ alloy exhibits the best thermal stability and remains amorphous up to 901 K. Moreover, the quasi-dislocations dipoles present in this amorphous alloy have the largest width equal to 6.7 nm. After annealing this alloy below the crystallization temperature the enhancement of both the average hyperfine field and its standard deviation is observed which points to the increase in the atom packing density due to the decay of quasi-dislocation dipoles. After the annealing at 901 K the small amount of the crystalline α-FeCo phase is presented in this alloy. The same crystalline phase appears in the bulk $Fe_{61}Co_{10}Y_8Ti_1B_{20}$ and $Fe_{61}Co_{10}Y_9B_{20}$ alloys after annealing at 750 K and 840 K, respectively.
Źródło:: Acta Physica Polonica A; 2008, 114, 6; 1659-1666
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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