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    Wyświetlanie 1-6 z 6
    Tytuł:
    Magnetic Anisotropy in Co/Nd Multilayers with Depth-Selectively Inserted $\text{}^{57}$Fe Probe Layer
    Autorzy:
    Baczewski, L. T.
    Mibu, K.
    Nagahama, T.
    Shinjo, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2013044.pdf
    Data publikacji:
    2000-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Gw
    75.70.-i
    76.80.+y
    Opis:
    Multilayers of Co/Nd with probe layer of 2 Å of $\text{}^{57}$Fe evaporated in UHV conditions were studied by means of vibrating sample magnetometry and Mössbauer spectroscopy at T = 4.2 K. Isomer shift, hyperfine field distribution and direction was obtained from the Mössbauer data computer fitting. Magnetic anisotropy was studied and discussed. The easy magnetization direction was close to the perpendicular direction for both samples but the tendency to perpendicular anisotropy was stronger when the Fe probe layer was placed in the vicinity of Co/Nd interface.
    Źródło:
    Acta Physica Polonica A; 2000, 97, 3; 439-442
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Grazing Incidence X-Ray Reflectivity Study of MBE-Grown Co/Cu Multilayers
    Autorzy:
    Pełka, J. B.
    Baczewski, L. T.
    Wawro, A.
    Domagała, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1963397.pdf
    Data publikacji:
    1997-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Gw
    75.30.-m
    75.70.-i
    Opis:
    In this work we report preliminary grazing-incidence X-ray reflectometry studies of multilayer structures composed of 3d metals Co and Cu deposited in the ultra-high vacuum molecular beam epitaxy system. The multilayers of different modulation period were deposited on glass substrate directly, or on 3d -metallic buffers of various thicknesses. The experimental specular reflectivity spectra were analyzed by a comparison with a theoretical model calculated from a recursive algorithm based on the Fresnel formula [1, 2]. It enabled us to estimate the structural parameters concerning layer thickness and roughness. The results obtained are correlated with magnetization measurements of the layered structures, as a function of modulation period, buffer type and thickness. A special attention to influence of interfacial roughness on magnetization results is paid.
    Źródło:
    Acta Physica Polonica A; 1997, 91, 5; 859-863
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preisach Maps of Multilayered Co/Cu Structures
    Autorzy:
    Gutowski, M.
    Gutowska, M. U.
    Piotrowski, K.
    Baczewski, L. T.
    Wawro, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2013071.pdf
    Data publikacji:
    2000-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.40.Mg
    75.60.Ej
    75.70.-i
    78.20.Ls
    78.66.-w
    Opis:
    Magnetooptical Kerr effect measurements of room temperature hysteresis loops were taken using sandwich- and multilayer-type specimens and He-Ne laser light. For maximal external field of ~250 Gs the corresponding Kerr angle reached 0.04 deg. The samples were obtained in the Institute of Physics, Polish Academy of Sciences, Warszawa, using MBE method. The structure of samples may be described by a formula: substrate-buffer layer-(xCo/yCu)$\text{}_{n}$ -cover layer. Al$\text{}_{2}$O$\text{}_{3}$ (two orientations) and MgO were used as substrates, the buffer layer was made of W, Cu or Fe, x=15, 20 or 25 Å, y=7, 8, 9, 10, 11, 12, 13, 14, and 20 Å, n=25 and 30. 50 Å of gold (Au) served as a cover layer. The genetic algorithm was subsequently used as a data processing tool, in order to reconstruct the Preisach map for each hysteresis loop. The diagrams clearly indicate changes of magnetic interactions caused by varying thicknesses of individual magnetic and non-magnetic layers.
    Źródło:
    Acta Physica Polonica A; 2000, 97, 3; 467-470
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Buffer Induced Magnetic Patterning of Ultrathin Co Layer
    Autorzy:
    Wawro, A.
    Petroutchik, A.
    Kurant, Z.
    Baczewski, L.
    Mazalski, P.
    Maziewski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1810547.pdf
    Data publikacji:
    2009-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.70.-i
    75.30.Gw
    75.75.+a
    68.37.Ps
    78.20.Ls
    Opis:
    The possibility of magnetic anisotropy engineering of ultrathin Co films in the scale of several dozen nanometers is investigated by magnetooptical magnetometry. In Au/Co/Au sandwiches the spin reorientation transition from the out-of-plane to the in-plane configuration is observed, when Co layer thickness exceeds 1.9 nm. Molybdenum as the underlayer suppresses the Co thickness range for which the perpendicular magnetization is stable. The application of patterned buffer in the form of Au islands grown on Mo layer for ultrathin Co film gives rise to the array of spatially stable magnetic dots fabrication ca. 100 nm in lateral size with magnetization perpendicular to the film plane surrounded by the area magnetized in the sample plane.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 1; 306-308
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure and Magnetism of MBE-Grown Co/Cu Multilayers
    Autorzy:
    Baczewski, L. T.
    Wawro, A.
    Domagała, J.
    Pełka, J.
    Szewczyk, A.
    Nabiałek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1955475.pdf
    Data publikacji:
    1997-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Gw
    75.30.-m
    75.70.-i
    Opis:
    Structural and magnetic properties of Co/Cu multilayers deposited in the ultra-high vacuum molecular beam epitaxy system on glass substrates with different modulations periods were investigated. A structural characterization was performed by means of RHEED and Auger spectroscopy (in situ), small angle X-ray reflectivity and scanning tunneling microscopy. The samples obtained have a textured, polycrystalline layered structure for deposition at room temperature. Magnetization and in-plane magnetoresistance measurements were performed as a function of Cu and Co layer thicknesses. An influence of different buffers and of interface quality on magnetic properties was investigated.
    Źródło:
    Acta Physica Polonica A; 1997, 91, 2; 315-319
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetism in Rare-Earth-Transition Metal Systems. Magnetization Reversal and Ultra-High Susceptibility in Sandwiched Thin Films Based on Rare-earth and Cobalt Alloys
    Autorzy:
    Baczewski, L.T.
    Givord, D.
    Alameda, J. M.
    Dieny, B.
    Nozieres, J. P.
    Rebouillat, J. P.
    Prejean, J. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1929319.pdf
    Data publikacji:
    1993-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.-m
    75.30.Gw
    75.70.-i
    75.70.Fr
    Opis:
    This paper is composed of two parts: theoretical and experimental. The theoretical part is divided into several sections. The main characteristic properties of 3d (transition metals) and 4f (rare-earth metals) magnetism are explained in the second section. The properties of rare-earth-transition metal compounds are discussed in the third section, particularly with respect to applications. The fourth section is devoted to the rapidly growing field of magnetic thin films. Specifrc properties of ultra-thin films and multilayers are summarized. In the experimental part the original magnetic properties of sandwich films, consisting of a soft amorphous Co-Zr layer placed between two Sm-Co layers with different coercivities, are reported.
    Źródło:
    Acta Physica Polonica A; 1993, 83, 5; 629-641
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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