Autor: Tóth, A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Influence of Ion Implantation on Magnetic Structural and Optical Properties of (Ga,Mn)As Epitaxial Films
Autorzy:: Yastrubchak, O.
Kulik, M.
Żuk, J.
Domagała, J.
Szymczak, R.
Wosiński, T.
Sadowski, J.
Tóth, A.
Powiązania:: https://bibliotekanauki.pl/articles/1812027.pdf
Data publikacji:: 2008-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.Pp
78.30.Fs
Opis:: We performed implantation experiments, applying both the chemically active oxygen ions and inactive ions of neon noble gas, to thin epitaxial films of (Ga,Mn)As ferromagnetic semiconductor. Inspection of their magnetic properties by means of a superconducting quantum interference device magnetometer revealed that the implantation with a low dose of either O or Ne ions completely suppressed ferromagnetism in the films. Both the high resolution X-ray diffraction technique and the Raman spectroscopy showed significant changes in the structural and optical properties of the films caused by oxygen implantation and confirmed the preservation of high structural and optical quality of the neon implanted (Ga,Mn)As films.
Źródło:: Acta Physica Polonica A; 2008, 114, 5; 1445-1450
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Influence of Recoil Effect and Surface Excitations on the Inelastic Mean Free Paths of Electrons in Polymers
Autorzy:: Lesiak, B.
Kosiński, A.
Jablonski, A.
Sulyok, A.
Gergely, G.
Tóth, J.
Varga, D.
Powiązania:: https://bibliotekanauki.pl/articles/2046849.pdf
Data publikacji:: 2006-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 82.35.Cd
82.80.Pv
87.16.Ac
Opis:: In this work, the influence of recoil effect and surface excitations on the inelastic mean free paths for polythiophenes is investigated. The inelastic mean free paths of electrons in polythiophenes are measured with the elastic peak electron spectroscopy method using the Ag standard and the electron elastic scattering cross-sections from the database NIST 3.1 in the electron kinetic energy range 200-5000 eV. The Monte Carlo model is applied for evaluating the electron backscattering intensities from the polymers and the Ag standard, as well as for evaluating electrons quasi-elastically backscattered from atoms of different atomic numbers (the recoil effect). The surface excitation corrections are accounted for using the formalism of Chen, with the material parameters for polythiophenes evaluated from the elastic peak electron spectroscopy method. Deviations due to recoil effect and surface excitations to the inelastic mean free paths are compared and discussed. Correction to the inelastic mean free paths due to recoil effect is considerable but is smaller, however, than the correction due to surface excitations. Accounting for recoil effect and surface excitations leads to improvement of the inelastic mean free paths, as compared to the inelastic mean free paths resulting from the predictive formulae of Gries.
Źródło:: Acta Physica Polonica A; 2006, 109, 6; 789-800
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The Anchoring Energy of Liquid Crystal Molecules to Magnetic Particles in HAB-Based Ferronematics
Autorzy:: Tomašovičová, N.
Koneracká, M.
Kopčanský, P.
Timko, M.
Závišová, V.
Vajda, A.
Fodor-Csorba, K.
Éber, N.
Tóth-Katona, T.
Jadzyn, J.
Powiązania:: https://bibliotekanauki.pl/articles/1813941.pdf
Data publikacji:: 2008-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.Mm
61.30.Gd
61.30.Hn
Opis:: In this work we describe the magnetic Freedericksz transition in HAB-based (4, 4'-di-n-heptylazoxybenzene) ferronematics. The ferronematic samples were prepared with two different volume concentrations of magnetic particles $φ_1 = 2×10^{-5}$ and $φ_2 = 2×10^{-4}$. The liquid crystal HAB is nematic at the temperatures from ≈53°C to 70°C and smectic A at the temperatures under 53°C. The anisotropy of dielectric permitivity of HAB liquid crystal is positive in nematic phase and negative in smectic A phase. The magnetic Fredericksz transition was studied in nematic phase at temperature 60°C.
Źródło:: Acta Physica Polonica A; 2008, 113, 1; 591-594
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Structural Phase Transition in Liquid Crystal Doped with Gold Nanoparticles
Autorzy:: Kopčanský, P.
Tomašovičová, N.
Koneracká, M.
Timko, M.
Mitróová, Z.
Závišová, V.
Éber, N.
Fodor-Csorba, K.
Tóth-Katona, T.
Vajda, A.
Jadzyn, J.
Beaugnon, E.
Chaud, X.
Powiązania:: https://bibliotekanauki.pl/articles/1535052.pdf
Data publikacji:: 2010-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.Mm
61.30.Gd
61.30.Hn
Opis:: The influence of the inclusion of the dodecanethiol functionalized gold particles (with diameter 3-5 nm) on the structural transitions was investigated. The studied samples were based on the nematic liquid crystal 4-(trans-4'-n-hexylcyclohexyl)-isothiocyanatobenzene (6CHBT). The volume concentration of the gold particles was $ϕ_1 = 2 × 10^{-4}$ and $ϕ_2 = 10^{-3}$. The obtained results showed that the inclusion of the gold particles in the 6CHBT liquid crystal increases the sensitivity of such system on the external magnetic field.
Źródło:: Acta Physica Polonica A; 2010, 118, 5; 988-989
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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