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    Wyświetlanie 1-4 z 4
    Tytuł:
    Influence of Cu Layer Thickness on Morphology and Magnetic Properties of Co/Cu Nanowires
    Autorzy:
    Kac, M.
    Kopec, M.
    Cieniek, L.
    Zarzycki, A.
    Kac, S.
    Maximenko, A.
    Dutkiewicz, E.
    Marszalek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030657.pdf
    Data publikacji:
    2018-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Gw
    75.60.Ej
    75.75.Cd
    78.67.Rb
    81.07.Gf
    82.45.Qr
    Opis:
    We studied changes of morphology and magnetic properties of Co/Cu multilayered nanowires, electrodeposited in polycarbonate membranes, as a function of Cu layer thickness. The morphology and structure of wire assemblies with an average diameter of 200 nm and length of 10 μ m, investigated by X-ray diffraction and scanning electron microscopy techniques, revealed polycrystalline structure of Cu and Co layers with smooth lateral surface of nanowires. Overdeposited nanowires created caps which showed flower-like dendrites with shape changing as a function of Cu thickness and electrodeposition parameters. Chemical composition of Co and Cu nanowires analysed by energy dispersive spectroscopy and proton induced X-ray emission showed Cu nanowires free from Co atoms while in Co nanowires, Cu contamination with concentration below 10% was observed. The oxidation traces observed in single-component Cu nanowires did not appear in multilayered nanowires. Magnetic measurements indicated easy axis of magnetization in membrane plane for nanowires with Cu thickness smaller than 20 nm, whereas for larger Cu thicknesses isotropic orientation of magnetization was observed. The presence of Cu atoms in single-component Co nanowires resulted in the appearance of magnetic anisotropy with easy axis along nanowire axis and the increase of coercivity value.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 2; 302-305
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Structure of RCuIn (R = Nd, Tb, Ho, Er)
    Autorzy:
    Szytuła, A.
    Baran, S.
    Jaworska-Gołąb, T.
    Penc, B.
    Zarzycki, A.
    Stűsser, N.
    Arulraj, A.
    Tyvanchuk, Yu.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813175.pdf
    Data publikacji:
    2008-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.12.-q
    71.20.Lp
    75.25.+z
    75.50.Ee
    Opis:
    Magnetic and neutron diffraction measurements of RCuIn (R = Nd, Tb, Ho, Er) are reported. The compounds crystallize in the hexagonal ZrNiAl-type structure. The ZrNiAl lattice originates from a distortion of a kagomélattice. The studied compounds are antiferromagnets with the Néel temperature equal to 4.9 K for R = Nd, 14.5 K for R = Tb, 4.5 K for R = Ho and 3.5 K for R = Er. The magnetic ordering is described by the propagation vectorwe k = (1/2, 1/2, $k_z$) with $k_z$ equal to 0.161(6) for R = Nd, 0.2213(5) for R = Tb, 0.2510(3) for R = Ho and 0 for R = Er. The magnetic structure is noncollinear with magnetic moments in the basal plane for R = Nd, Tb and Ho and collinear with magnetic moments parallel to the c-axis for R = Er. The observed magnetic ordering results from the competition between exchange interactions of the Ruderman-Kittel-Kasuya-Yosida type, the geometrical frustration of the rare-earth magnetic moments and the influence of the crystal electric field. The latter affects the direction of magnetic moments and is responsible for the magnetic crystalline anisotropy.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 4; 1185-1192
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Properties of the Nanocrystalline $DyMnO_{3}$ Compound
    Autorzy:
    Dyakonov, V.
    Szytuła, A.
    Baran, S.
    Kravchenko, Z.
    Zubov, E.
    Iessenchuk, O.
    Bazela, W.
    Dul, M.
    Zarzycki, A.
    Szymczak, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1538453.pdf
    Data publikacji:
    2010-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.05.cp
    75.47.Lx
    75.50.Ee
    75.75.-c
    Opis:
    We report on the X-ray powder diffraction and magnetic measurements of the polycrystalline and the two nanocrystalline samples of $DyMnO_{3}$ compound synthesized at temperatures of 800 and 850°C. All samples at room temperature crystallize in the orthorhombic crystal structure (space group Pnma). The crystal structure parameters determined change only slightly with preparation methods but the average grains size of the nanoparticles determined from X-ray data increases significantly with increasing annealing temperature. Temperature dependence of the magnetic susceptibility indicates the antiferromagnetic order in Dy sublattice at low temperatures.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 4; 607-610
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Sediments Causing Damage to Water Meters in a Large Drinking Water Distribution System
    Autorzy:
    Kopeć, M.
    Roman, M.
    Kąc, M.
    Budziak, A.
    Paluszkiewicz, C.
    Zarzycki, A.
    Kąc, S.
    Dutkiewicz, E.
    Cichoń, T.
    Bochnia, T.
    Kwiatek, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030652.pdf
    Data publikacji:
    2018-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    89.60.-k
    78.70.En
    61.05.cp
    82.80.-d
    82.80.Gk
    Opis:
    Preliminary studies on the sediments collected from water meters of Krakow water supply system were performed in the cooperation with the Municipal Water Supply and Sewage. Creation and deposition of sediments on the measuring devices installed in the water supply system is a serious technological and economical problem for water companies, defectively operating for this reason water meters must be replaced. It is evident that knowledge of the chemical and phase composition of sediments is an important step towards resolving the problem of impurities in water supply systems. Four different samples of sediments, coming from water meters, were investigated using the proton-induced X-ray emission, the X-ray diffraction, the Fourier transform infrared and Raman spectroscopy. The X-ray methods revealed presence of amorphous and fine-crystalline phases as well as high content of iron-based compounds. As a crystalline phase, the most frequently appeared: goethite, lepidocrocite, iron oxides (hematite, maghemite, magnetite), calcium carbonate, and quartz. In one of the samples, the nanocrystalline phase was found and identified as hydrous iron oxyhydroxide ferrihydrite. Vibrational spectroscopy methods confirmed the composition of crystalline phases as well as enabled to estimate the abundance of amorphous phase in samples.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 2; 296-301
    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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