Autor: Olszewski, J. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Ordering and Magnetoelastic Properties of Fe-Ga Alloy
Autorzy:: Perduta, K.
Olszewski, J.
Busbridge, S.
Nabiałek, M.
Powiązania:: https://bibliotekanauki.pl/articles/1811585.pdf
Data publikacji:: 2008-12
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 76.80.+y
75.50.Bb
75.80.+q
81.40.Ef
83.80.Ab
Opis:: In this paper the investigations of the ordering, microstructure and magnetomechanical properties of the $Fe_{80}Ga_{20}$ alloy and its composites are presented. The composites consisted of the Fe-Ga particles with a size distribution in the range between 20 and 50 μm. These particles were produced by blade-milling of arc-melted alloy. After milling the powders were annealed at 723 K for 2.5, 7.5, and 12.5 h. The epoxy-bonded composites in rectangular shape were made from the as-cast as well as from the annealed powders. The Mössbauer spectroscopy studies revealed that the as-cast alloy is completely disordered. After annealing at 723 K the long range atomic order appeared. It was stated that the best magnetoelastic properties were exhibited by composites made from ferromagnetic particles obtained from the as-cast alloy. The measured saturation magnetostriction was $λ_s = 70× 10^{-6}$ for the bulk alloy and $λ_s=100× 10^{-6}$ for composite.
Źródło:: Acta Physica Polonica A; 2008, 114, 6; 1537-1543
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

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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Skocz do pozycji: 3.

Tytuł:: Hyperfine Interactions of $\text{}^{57}Fe$ in #Pt_3Fe# - Ab Initio and Mössbauer Effect Studies
Autorzy:: Deniszczyk, J.
Satuła, D.
Waliszewski, J.
Rećko, K.
Olszewski, W.
Parzych, G.
Szymański, K.
Powiązania:: https://bibliotekanauki.pl/articles/1810456.pdf
Data publikacji:: 2009-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.15.Ap
71.15.Nc
71.20.-b
71.20.Be
71.20.Lp
75.50.Bb
76.80.+y
Opis:: The Mössbauer effect and ab initio investigations of an electric field gradient at $\text{}^{57}Fe$ nuclei in $Pt_3Fe$ compound are presented. It is shown that nonzero $\text{}^{57}Fe$ electric field gradient exists in the cubic $Pt_3Fe$. Ab initio study of $Pt_3Fe$ in antiferromagnetic state confirms the presence of electric field gradient at $\text{}^{57}Fe$ nuclei. Lattice, local valence electron (3d, 4p) and weakly bound 3p core electron contributions to electric field gradient are separated out and discussed in the context of the electronic structure changes upon the antiferromagnetic phase transition.
Źródło:: Acta Physica Polonica A; 2009, 115, 1; 197-199
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

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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