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Wyszukujesz frazę "Kulyk, V." wg kryterium: Autor

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Evaluation of Differences between Fe₃O₄ Micro- and Nanoparticles Properties
    Autorzy:
    Duriagina, Z.
    Tepla, T.
    Kulyk, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030923.pdf
    Data publikacji:
    2018-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    Fe₃O₄ micro- and nanoparticles
    atomic-force microscopy
    magnetization
    superparamagnetism
    Opis:
    Small sizes of nanoparticles lead to the appearance of new unique functional properties. Under transition to nanosizes in metals and their compounds new specific characteristics appears. In this work, the microstructural and magnetic properties of Fe₃O₄ nanoparticles (Fe₃O₄-NP) have been compared with those of commercially available Fe₃O₄ microparticles (Fe₃O₄-MP) and detailed analysis of differences has been carried out. The synthesis of Fe₃O₄-NP was carried out by means of colloidal method performed without the use of surfactants. Commercial and synthesized particles were characterized using NTEGRA Prima (NT-MDT) atomic force microscope. For magnetic properties investigations we used the method of vibrating sample magnetometer.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 4; 869-872
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural Properties and Temperature Behaviour οf Optical Absorption Edge in Polycrystalline ZnO:X (Cu,Ag) Films
    Autorzy:
    Kulyk, B.
    Figà, V.
    Kapustianyk, V.
    Panasyuk, M.
    Serkiz, R.
    Demchenko, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1400391.pdf
    Data publikacji:
    2013-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.37.Ps
    78.40.Fy
    68.55.ag
    Opis:
    Silver- and copper-doped ZnO films were prepared by radio-frequency magnetron sputtering on glass substrates. The influence of dopants content on the structural, morphological properties as well as on evolution of the optical absorption edge was considered. It has been found that Ag- and Cu-doped ZnO films are characterized by wurtzite crystalline structure with the preferred direction of crystalline orientation (002). The sizes of grains within the films were found to be dependent on the type of dopant. The temperature evolution of the optical absorption edge is described by the modified Urbach rule that reflects polycrystalline nature of the material. The corresponding parameters concerning electron- (exciton-) phonon interaction, phonon energies and temperature changes of the band-gap were determined and analysed.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 1; 92-97
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radiation Effects in DMAAS:Cr Ferroelectric Crystal
    Autorzy:
    Kapustianik, V.
    Czapla, Z.
    Eliyachevskyy, Yu.
    Korchak, Yu.
    Kulyk, B.
    Rudyk, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/2037039.pdf
    Data publikacji:
    2003-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.40.Ha
    64.70.Kb
    77.84.-s
    78.30.Hv
    Opis:
    This paper presents the results of investigations of the radiation effects in NH$\text{}_{2}$(CH$\text{}_{3}$)$\text{}_{2}$Al(SO$\text{}_{4}$)$\text{}_{2}$×6H$\text{}_{2}$O crystals doped with chromium. On the basis of absorption spectroscopy and resonance Raman scattering study it has been shown that comparatively low doses of radiation first of all causes recharging of Cr$\text{}^{3+}$ on Cr$\text{}^{4+}$ ions. Besides, the processes of dehydrogenation and the changes in arrangement of the hydrogen bond network were observed. These changes are followed by distortion of the complexes bonded by such a type of bonds.
    Źródło:
    Acta Physica Polonica A; 2003, 104, 6; 571-580
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Manganite nanoparticles as promising heat mediators for magnetic hyperthermia: comparison of different chemical substitutions
    Autorzy:
    Tovstolytkin, A.
    Shlapa, Yu.
    Solopan, S.
    Bodnaruk, A.
    Kulyk, M.
    Kalita, V.
    Zamorskyi, V.
    Ryabchenko, S.
    Belous, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1052905.pdf
    Data publikacji:
    2018-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    magnetic nanohyperthermia
    manganite nanoparticles
    complex chemical substitutions
    Curie temperature
    AC magnetic heating characteristics
    Opis:
    Magnetostatic properties and AC magnetic heating characteristics of (La,Sr)MnO₃ nanoparticles with substitutions in manganese and lanthanum sublattices have been studied. The nanoparticles with average sizes in the range 25-38 nm were synthesized via sol-gel method. Fe substitution for Mn, as well as Sm substitution for La have been used in the experiment. It is shown that the increase in substitution level (for both Fe and Sm substitutions) results in lowering the Curie temperature T_{C} and weakening heating efficiency under the action of AC magnetic field. The results demonstrate that the action of AC field causes effective heating of nanoparticles at temperatures lower than T_{C}, while heating efficiency becomes strongly reduced at higher temperatures. It is proved experimentally that the substitutions in Mn sublattice result in more rapid changes of magnetic properties, as compared to the substitutions in La one. Thus, complex substitutions based on suitable combinations of substituting elements may serve as an efficient tool to "softly" tune the maximal temperature achieved during the AC magnetic field induced heating of nanoparticles, which is important for application of these materials as heat mediators for self-controlled magnetic nanohyperthermia.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 4; 1017-1020
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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