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    Wyświetlanie 1-4 z 4
    Tytuł:
    Modification of the Structure and Properties of FeSiB Amorphous Ribbon by Interference Pulsed Laser Heating
    Autorzy:
    Czyż, O.
    Kusiński, J.
    Radziszewska, A.
    Ostrowski, R.
    Morgiel, J.
    Kanak, J.
    Kąc, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/355908.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    laser heating
    FeSiB
    crystallization
    magnetic properties
    structure
    Opis:
    Paper describes the results of Fe80Si11B9 amorphous ribbon investigation after pulsed laser interference heating and conventional annealing. As a result of interference heating periodically placed laser heated microareas were obtained. Structure characterisation by scanning and transmission electron microscopy showed in case of laser heated samples presence of crystalline nanostructure in amorphous matrix. Microscopy observations showed significant difference in material structure after laser heating – nanograin structure, and material after annealing – dendritic structure. Magnetic force microscopy investigation showed expanded magnetic structure in laser heated microareas, while amorphous matrix did not give magnetic signal. Change of magnetic properties was examined by magnetic hysteresis loop measurement, which showed that the laser heating did not have a significant influence on soft magnetic properties.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 4; 2001-2007
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural and magnetic properties of MBE grown (Fe/Pt) (111) multilayers
    Autorzy:
    Marynowska, A.
    Dynowska, E.
    Lewińska, S.
    Seki, T.
    Takanashi, K.
    Kanak, J.
    Pietruczik, A.
    Aleszkiewicz, P.
    Wawro, A.
    Ślawska-Waniewska, A.
    Baczewski, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1058152.pdf
    Data publikacji:
    2016-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.05.cp
    61.05.jh
    68.35.bd
    68.35.Ct
    68.37.Ef
    68.37.Ps
    68.65.Ac
    75.50.Bb
    75.70.Ak
    Opis:
    Series of Al₂O₃(0001)/Pt/(Fe/Pt)ₙ/Pt multilayers with variable number of bilayers n and thicknesses of individual layers were grown using molecular beam epitaxy to investigate influence of buffer layer structure, number of bilayers, and individual layer thickness on their structural and magnetic properties. Both columnar and monocrystalline 10 nm Pt (111) buffer layers were used in the experiment. Structure of Pt buffer layer determined the roughness of Fe/Pt interfaces and consequently magnetic properties of the multilayers. When multilayers were deposited on columnar Pt buffer layer, we observed increase of Fe/Pt interfaces roughness with increasing number of bilayers to values exceeding the nominal Fe/Pt bilayer thickness in the upper part of the sample volume, which resulted in the increment of coercivity in the sample with n=15 determined from hysteresis loops measured for perpendicular orientation of magnetic field. When Fe/Pt multilayers were deposited on monocrystalline Pt buffer layer, Fe/Pt interfaces were smooth regardless the number of bilayers. All samples, despite of the quality of buffer layer, number of bilayers, and individual layer thickness revealed easy magnetisation axis oriented in the sample plane.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 6; 1363-1370
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure and Magnetism of LSMO/BTO/MgO/LSMO Multilayers
    Autorzy:
    Pawlak, J.
    Żywczak, A.
    Szwachta, G.
    Kanak, J.
    Gajewska, M.
    Przybylski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030441.pdf
    Data publikacji:
    2018-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.60.Ej
    Opis:
    A multiferroic tunnel junction (MFTJ) is a promising device for future memory systems with discrete and different logic states which are controlled by a combination of electric and magnetic fields. The goal of ongoing research is to present ferroelectric and ferromagnetic properties, especially at room temperature (RT), represented as high values of tunnel electroresistance (TER) and tunnel magnetoresistance (TMR). A key aspect is the appropriate preparation of a sample allowing epitaxial growth. The thin layers were prepared by pulsed laser deposition on atomically smooth monocrystalline SrTiO₃ (STO) substrates. The ferromagnetic metal layers La_{0.67}Sr_{0.33}MnO₃ (LSMO) are separated by a layer of a ferroelectric insulator - BaTiO₃ (BTO). The same structure of LSMO, BTO and STO (perovskite) and a similar lattice constant make it possible to obtain high-quality heterostructures. Magnetic measurements confirm differences in the magnetic coercivity of the top and bottom LSMO layer, which allows to obtain their parallel and antiparallel magnetization orientation. A modification of the interfaces of BTO by thin MgO layer enables an increase in the value of the TER effect.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 3; 548-551
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modification of Magnetic Properties of Pt/Co/Pt Films by $Ga^{+}$ Ion Irradiation: Focused versus Uniform Irradiation
    Autorzy:
    Sveklo, I.
    Mazalski, P.
    Jaworowicz, J.
    Jamet, J.
    Vernier, N.
    Mougin, A.
    Ferré, J.
    Kisielewski, M.
    Zablotskii, V.
    Bourhis, E.
    Gierak, J.
    Postava, K.
    Fassbender, J.
    Kanak, J.
    Maziewski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398198.pdf
    Data publikacji:
    2018-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    ultrathin films
    ion irradiation
    magnetic hysteresis
    magnetic anisotropy
    magneto-optic Kerr effect
    Opis:
    30 keV $Ga^{+}$ irradiation-induced changes of magnetic and magneto-optical properties of sputtered Pt/Co/Pt ultrathin trilayers films have been studied as a function of the ion fluence. Out-of-plane magnetic anisotropy states with enhanced magneto-optical effects were evidenced for specific values of cobalt thickness and irradiation fluence. Results obtained after uniform or quasi-uniform focused ion beam irradiation on either out-of-plane or in-plane magnetized sputtered pristine trilayers are compared. Similar irradiation-induced magnetic changes are evidenced in quasi-uniformly focused ion beam or uniformly irradiated films, grown either by sputtering or molecular beam epitaxy. We discuss on plausible common mechanisms underlying the observed effects.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 5; 1215-1226
    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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