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Wyszukujesz frazę "Babonas, G.-J." wg kryterium: Autor

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    Wyświetlanie 1-9 z 9
    Tytuł:
    Formation of Iron-Containing Clusters in Silica of Predetermined Porosity
    Autorzy:
    Šimkiene, I.
    Baran, M.
    Babonas, G.-J.
    Bendorius, R.-A.
    Rėza, A.
    Szymczak, R.
    Aleshkevych, P.
    Šustavičiūtė, R.
    Tamaševičius, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2041804.pdf
    Data publikacji:
    2005-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.46.+w
    75.75.+a
    78.66.-w
    Opis:
    Iron-containing nanoparticles and clusters were formed in silica with porosity, which was predetermined by different procedures of sol-gel technology and the chemical composition of precursors. Bulk and layer-type samples of different porosity were synthesized and investigated. The morphology, magnetic, and optical properties were studied to characterize the samples and to analyze the formation of Fe-oxides. Experimental results showed that both Fe$\text{}_{2}$O$\text{}_{3}$ and Fe$\text{}_{3}$O$\text{}_{4}$ were formed in the samples and that their relative amount was dependent on preparation technology.
    Źródło:
    Acta Physica Polonica A; 2005, 107, 2; 400-407
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Photoemission and Optical Spectroscopy of i-ZnMgEr Quasicrystal
    Autorzy:
    Suchodolskis, A.
    Assmus, W.
    Babonas, G.-J.
    Giovanelli, L.
    Karlsson, U. O.
    Karpus, V.
    Le Lay, G.
    Rėza, A.
    Uhrig, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2041813.pdf
    Data publikacji:
    2005-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.23.Ft
    Opis:
    The results of photoemission and optical studies of icosahedral single-grain ZnMgEr quasicrystals are presented. Synchrotron radiation photoemission measurements were performed on in situ cleaved samples at 10$\text{}^{-10}$ mbar pressure and low, 140-150 K temperature. The valence band photoemission spectra measured reveal a simple metal-type valence band of icosahedral ZnMgEr with a distinct Fermi edge cut-off and with a sharp pseudogap feature. The photoemission spectra of shallow Mg 2p and Zn 3d core levels indicate a coordination shift of Mg 2p spin-orbit doublet and an oscillating dependence of Zn 3d photoemission line components on the photon energy within the hν=20-160 eV range investigated. The optical response of icosahedral ZnMgEr, a dispersion of the dielectric function, was measured by the spectroscopic ellipsometry technique in the 0.5-5.0 eV spectral range. The optical spectra of the quasicrystal indicate the Drude-type optical response superimposed with a peak of interband optical transitions. The interband optical transitions can be modelled with the pseudogap parameters which agree with those deduced in an analysis of the photoemission valence band spectra.
    Źródło:
    Acta Physica Polonica A; 2005, 107, 2; 412-419
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ellipsometric Studies of NdMnO$\text{}_{3}$ Single Crystals
    Autorzy:
    Babonas, G. J.
    Reza, A.
    Szymczak, R.
    Baran, M.
    Shiryaev, S.
    Fink-Finowicki, J.
    Szymczak, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2037130.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.20.-b
    78.20.Ci
    Opis:
    Ellipsometric studies of NdMnO$\text{}_{3}$ single crystals of orthorhombic symmetry were carried out in the spectral range 0.5-5.0 eV. Experimental data, which were obtained on the (001)$\text{}_{pc}$-type planes of pseudo-cubic system, were analyzed in the model of biaxial crystal. For the first time, three componentsε$\text{}_{x}$,ε$\text{}_{y}$,ε$\text{}_{z}$ of the effective dielectric function for manganites of orthorhombic symmetry were determined. From ellipsometric data, the spectra of optical conductivity and loss function were also calculated and considered. The fine structure of the spectra and optical anisotropy was the basis for discussion of the microscopic origin of the optical transitions responsible for the optical features. The electronic excitations due to dipole-forbidden spin-allowed transitions of the d-d-type in Mn-ions, f-f-type in Nd-ions and charge-transfer 2p(O)-3d(Mn) transitions were taken into account. The data for NdMnO$\text{}_{3}$ were compared with those obtained for other related undoped and doped single crystals of perovskite-type structure, LaMnO$\text{}_{3}$, (LaBa)(MnCo)O$\text{}_{3}$ and (LaCa)CoO$\text{}_{3}$.
    Źródło:
    Acta Physica Polonica A; 2004, 105, 1-2; 197-208
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical Response of La$\text{}_{1-x}$MnO$\text{}_{3}$/Al$\text{}_{2}$O$\text{}_{3}$ Films
    Autorzy:
    Babonas, G.-J.
    Reza, A.
    Szymczak, R.
    Baran, M.
    Fröhlich, K.
    Jasutis, V.
    Diduszko, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2035658.pdf
    Data publikacji:
    2003-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.66.Li
    75.70.Ak
    Opis:
    La$\text{}_{1-x}$MnO$\text{}_{3}$ films grown by metal organic chemical vapor deposition technique on r-plane cut Al$\text{}_{2}$O$\text{}_{3}$ substrates were investigated. The change of the optical response over the La$\text{}_{1-x}$MnO$\text{}_{3}$/Al$\text{}_{2}$O$\text{}_{3}$ sample surface was investigated along with the temperature dependence of magnetization. The mostly pronounced difference in the spectra of dielectric function occurred in the region of the d-d transitions of Mn-ions. The changes in the optical spectra and magnetic properties were correlated to the structural features of thin film.
    Źródło:
    Acta Physica Polonica A; 2003, 103, 1; 77-83
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physical Properties of (M$\text{}_{2}$Cu$\text{}_{2}$O$\text{}_{3}$)$\text{}_{m}$(CuO$\text{}_{2}$)$\text{}_{n}$ (M = Ca, Sr, Bi) Single Crystals with Bi-2212 Phase on their Surface
    Autorzy:
    Babonas, G.-J.
    Leonyuk, L.
    Maltsev, V.
    Szymczak, R.
    Reza, A.
    Baran, M.
    Dapkus, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2028903.pdf
    Data publikacji:
    2001-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.66.-w
    74.72.Jt
    74.76.Bz
    Opis:
    The structural, optical, and magnetic properties are studied in the (M$\text{}_{2}$Cu$\text{}_{2}$O$\text{}_{3}$)$\text{}_{m}$(CuO$\text{}_{2}$)$\text{}_{n}$-type single crystals with the surface on which the Bi-2212-type phase was indicated. The physical properties of such samples were interpreted to some extent by the contributions of two phases. When the secondary phases on the surface of the samples were removed by mechanical polishing or etching by Ar$\text{}^{+}$-ion plasma, the physical properties were typical of the (M$\text{}_{2}$Cu$\text{}_{2}$O$\text{}_{3}$)$\text{}_{m}$(CuO$\text{}_{2}$)$\text{}_{n}$-type crystals. The optical method was shown to be effective for indication of secondary Bi-rich phases on the surface of (M$\text{}_{2}$Cu$\text{}_{2}$O$\text{}_{3}$)$\text{}_{m}$(CuO$\text{}_{2}$)$\text{}_{n}$ samples.
    Źródło:
    Acta Physica Polonica A; 2001, 100, 4; 553-563
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electron Microscopy and X-ray Structural Investigations of Incommensurate Spin-Ladder Sr$\text{}_{4.1}$Ca$\text{}_{4.7}$Bi$\text{}_{0.3}$Cu$\text{}_{17}$O$\text{}_{29}$ Single Crystals
    Autorzy:
    Dłużewski, P.
    Pietraszko, A.
    Kozłowski, M.
    Szczepańska, A.
    Górecka, J.
    Baran, M.
    Leonyuk, L.
    Babonas, G.-J.
    Lebedev, O.
    Szymczak, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2014560.pdf
    Data publikacji:
    2000-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.72.Nn
    61.72.Mm
    74.72.-h
    61.16.Bg
    61.10.-i
    Opis:
    Transmission electron microscopy and X-ray diffraction proved chain ladder incommensurate single crystal structure of investigated samples. The incommensurate ratio was determined from the X-ray and electron diffraction being equal to 0.704. Diffuse scattering intensities localised on the planes perpendicular to the c*-axis and passing through the spots originating from the periodicity of chain sublattice were detected. High-angle grain boundary or twinning formed by rotation of 33.3° around [100] direction was observed. High-resolution electron microscopy images revealed the stacking faults in ac planes.
    Źródło:
    Acta Physica Polonica A; 2000, 98, 6; 729-737
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Properties of Spin-Ladders (A$\text{}_{2}$Cu$\text{}_{2}$O$\text{}_{3}$)$\text{}_{m}$ (CuO$\text{}_{2}$)$\text{}_{n}$
    Autorzy:
    Baran, M.
    Szymczak, H.
    Szymczak, R.
    Dyeyev, S.
    Leonyuk, L.
    Babonas, G.-J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2013220.pdf
    Data publikacji:
    2000-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.40.Cx
    75.30.Gw
    75.45.+j
    75.90.+w
    Opis:
    Magnetization M(T) and M(H) data of single crystals of the S=1/2 quasi-one-dimensional system (A$\text{}_{2}$Cu$\text{}_{2}$O$\text{}_{3}$)$\text{}_{m}$(CuO$\text{}_{2}$)$\text{}_{n}$ with various A-site constituents are compared. The studied orthorhombic, incommensurate crystals are characterized by m/n=5/7,7/10, and 9/13. The role of rare-earth ions located in A-sites is discussed.
    Źródło:
    Acta Physica Polonica A; 2000, 97, 3; 571-574
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Epitaxial Intergrowth of Isostructural Phases in Bi-2212 Single Crystals
    Autorzy:
    Babonas, G.-J
    Leonyuk, L.
    Maltsev, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1964532.pdf
    Data publikacji:
    1997-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.62.Bf
    74.72.Hs
    Opis:
    The isostructural phases in Bi-2212-type HTSC were studied by structural and optical methods. The epitaxial intergrowth was shown to be a feature typical of single crystals composed of several isostructural phases. The physical properties of the multi-phase samples were interpreted on the basis of reference mono-phase samples. A presence of the intergrowth interface was assumed to be responsible for particular features in multi-phase samples.
    Źródło:
    Acta Physica Polonica A; 1997, 92, 1; 251-254
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural Determination of Epitaxial Formations in Layered Cuprates
    Autorzy:
    Leonyuk, L.
    Maltsev, V.
    Babonas, G.-J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1964292.pdf
    Data publikacji:
    1997-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.62.Bf
    74.72.-h
    Opis:
    The fragment approximation is used for the description of the layered cuprate structures. The characteristic structural features are distinguished which genetically relate all the layered cuprates. The classification scheme for the whole family of layered cuprates is analyzed in the fragment approximation and a possible extension of the scheme is discussed.
    Źródło:
    Acta Physica Polonica A; 1997, 92, 1; 143-146
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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