Autor: Fornal, J. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Mobility of Hematite Submicron Particles in Water Solutions of Sugar
Autorzy:: Fornal, P.
Stanek, J.
Powiązania:: https://bibliotekanauki.pl/articles/1811893.pdf
Data publikacji:: 2008-12
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 05.40.Jc
47.57.ef
47.57.J-
47.61.Cb
Opis:: The mobility of the 100 nm $Fe_2O_3$ particles in dense water solutions of sugar (sucrose) was determined from the analysis of the resonance absorption line shape of the Mössbauer spectra recorded in the -5°C to 40°C temperature range for different sugar concentrations. The discrepancy between the experimental data and the prediction of the classical theory of Brownian movement are interpreted in the term of the short observation time and the interaction between the solid particles in fluids, which extends in water up to 300 nm. The sedimentation process in the studied colloids was observed.
Źródło:: Acta Physica Polonica A; 2008, 114, 6; 1667-1673
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Brownian Movement of Inorganic Nanoparticles in Sediments
Autorzy:: Fornal, P.
Stanek, J.
Powiązania:: https://bibliotekanauki.pl/articles/1506300.pdf
Data publikacji:: 2011-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 05.40.Jc
64.75.Xc
47.57.ef
66.30.Pa
87.64.kx
Opis:: The 100 nm particles of $Fe_{2}O_{3}$ and metallic Fe sedimented jointly with $Al_{2}O_{3}$ powder from their suspension in oleic acid exhibit distinguished mobility which depends on the concentration of aluminum oxide. This observation is interpreted as the result of the interparticle Fe-Fe magnetic interactions which lead to the formation of the rigid network of magnetic metallic iron nanoparticles.
Źródło:: Acta Physica Polonica A; 2011, 119, 1; 12-14
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Microstructure and Dynamics of Magnetic Iron Nanoparticles Aggregates in Protein Gels
Autorzy:: Konik, K.
Fornal, P.
Okła, D.
Stanek, J.
Powiązania:: https://bibliotekanauki.pl/articles/1490101.pdf
Data publikacji:: 2012-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.75.Jn
83.60.Np
61.25.H-
82.70.Gg
Opis:: The 60 nm metallic iron nanoparticles and its aggregates in gelatine gel were studied by means of optical microscopy, X-ray microtomography, atomic force scanning microscopy and the Mössbauer spectroscopy. The isolated nanoparticles in gel exhibit fast bounded diffusion described by Brownian movement. In the external magnetic field these magnetic particles form spectacular linear aggregates whose local dynamical and magnetic properties were determined from the Mössbauer spectra.
Źródło:: Acta Physica Polonica A; 2012, 121, 2; 457-463
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Local States of Tellurium in Isolated Helical Chains
Autorzy:: Stanek, J.
Fornal, P.
Hafner, S. S.
Pfitzner, A.
Powiązania:: https://bibliotekanauki.pl/articles/2028993.pdf
Data publikacji:: 2001-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 76.80.+y
Opis:: The local electronic state of Te in the helical chains of CuXY$\text{}_{2(1-x)}$Te$\text{}_{2x}$ (X = Cl, Br; Y = Se, S) were studied using the Mössbauer spectroscopy of $\text{}^{125}$Te at 10 K and 70 K. The isolated chains of Te in these compounds are less rigid than those in elemental Te. The determined data of quadrupole splitting Δ and Debye temperature Θ$\text{}_{D}$ are indicative of strong local ordering of Te in one of the two non-equivalent crystallographic positions. It was not possible to resolve crystallographic positions by the Mössbauer spectroscopy.
Źródło:: Acta Physica Polonica A; 2001, 100, 5; 807-815
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Magnetoelastic Phase Transitions and Critical Behaviour of (Fe$\text{}_{1-x}$Ni$\text{}_{x}$)$\text{}_{2}$P System
Autorzy:: Średniawa, B.
Duraj, R.
Pacyna, A.
Bombik, A.
Zach, R.
Bacmann, M.
Fruchart, D.
Nizioł, S.
Fornal, P.
Stanek, J.
Powiązania:: https://bibliotekanauki.pl/articles/2013735.pdf
Data publikacji:: 2000-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.Cc
71.20.Lp
Opis:: This report focuses on magnetoelastic properties and critical behaviour of (Fe$\text{}_{1-x}$Ni$\text{}_{x}$)$\text{}_{2}$P system. For low Ni content (x=0.01) an isolated critical point was found. Analysis of this critical behaviour in the frame of molecular field approximation was carried out. Moreover, thermal variations of the lattice parameters, as measured by X-ray diffraction techniques, were studied. The (P,T) phase diagrams obtained for several Ni contents show the evidence that the Curie temperature decreases with pressure. The Mössbauer spectra collected for x = 0.025, 0.1, 0.2, 0.25 at different temperatures are also analysed. The existence of two nonequivalent crystallographic sites occupied by iron atoms as well as local magnetic structure is discussed.
Źródło:: Acta Physica Polonica A; 2000, 97, 5; 921-925
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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