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Wyszukujesz frazę "Jankowska-Kisielińska, J." wg kryterium: Autor

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Inelastic Neutron Scattering Investigation of Magnetic Excitations in the Quenched and Decomposed Samples of the $Mn_{0.75}Cu_{0.25}$ Alloy
    Autorzy:
    Jankowska-Kisielińska, J.
    Świderska, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399024.pdf
    Data publikacji:
    2013-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.05.fm
    78.70.Nx
    75.30.Ds
    81.40.-z
    Opis:
    The influence of spinodal decomposition on the spin wave characteristics in the $Mn_{0.75}Cu_{0.25}$ alloy was studied with inelastic neutron scattering. The measurements were performed on the quenched and annealed samples at a few temperatures. Parameters of spin-wave dispersion-relation for small wave-vector were derived. The values of spin wave velocity and energy gap obtained at reduced temperature $T//T_{N}$ ≈ 0.65 are after decomposition twice higher than for the quenched sample. For the decomposed sample the values of both parameters are close to the results published for the $Mn_{0.9}Cu_{0.1}$ alloy. This fact confirms that after decomposition spin waves are present in the sample regions of Cu concentration close to 0.1 and that the neighborhood of regions with high Cu content seems not to influence them. The spin wave velocity for the quenched sample is lower than observed in any other manganese alloy.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 6; 990-993
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Inelastic Neutron Scattering in γ-Mn(12%Ge) Alloy Above and Below the Néel Temperature
    Autorzy:
    Jankowska-Kisielińska, J.
    Mikke, K.
    Hennion, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/2013221.pdf
    Data publikacji:
    2000-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.40.Gb
    75.30.Ds
    75.20.En
    Opis:
    The magnetic excitations different from spin waves in the γ-Mn(12%Ge) antiferromagnet are the subject of the present investigation. The inelastic neutron scattering was measured at 4 temperatures above T$\text{}_{N}$. The Lorentzian-type formula for the inelastic neutron scattering cross-section with the spectral width for a hydrodynamic region was used for data analysis. The obtained values of the "stiffness constants" are of the order of 200 meV Å and they depend weakly on temperature in the range of 1.04-1.25T$\text{}_{N}$. The inelastic neutron scattering for energy transfers below and close to the value of the gap energy of the spin wave spectrum was measured at room temperature. The observed intensities can be treated as a sum of intensities of neutrons scattered on spin waves around the magnetic Brillouin zone centre and = those scattered on fluctuations at the zone boundary.
    Źródło:
    Acta Physica Polonica A; 2000, 97, 3; 559-562
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Properties of $DO_{3}$-Type Alloys Based on $Fe_{3}Si$ and $Fe_{3}Al$
    Autorzy:
    Parzych, G.
    Jankowska-Kisielinska, J.
    Dobrzyński, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1538294.pdf
    Data publikacji:
    2010-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Ds
    75.30.Et
    78.70.Nx
    Opis:
    The interest in magnetic properties of $DO_{3}$-type alloys stems from their ability to exhibit dependence of magnetic moments on local environment. It is shown that both, static and dynamic properties of the alloys based on $Fe_{3}Si$ and $Fe_{3}Al$ require further investigations. This concerns mainly the problem of selective substitution of chromium for iron, as well as spin dynamics, the latter problem is illustrated on the example of measured spin waves in Sendust.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 4; 578-581
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Anisotropy of the Neutron Scattering in the Paramagnetic Phase and on the Spin Waves in the $Mn_{0.71}Ni_{0.29}$ Alloy
    Autorzy:
    Jankowska-Kisielińska, J.
    Fijał-Kirejczyk, I.
    Mikke, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1810466.pdf
    Data publikacji:
    2009-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.05.fm
    78.70.Nx
    75.30.Ds
    75.40.-s
    75.40.Gb
    Opis:
    We have confirmed the significant anisotropy of the generalised magnetic susceptibility in the paramagnetic and antiferromagnetic phase of the fcc Mn-Ni alloys. In this paper the detailed account of the experiments performed on the $Mn_{0.71}Ni_{0.29}$ alloy is given. Our main result for the paramagnetic phase is that the correlation length is larger for the direction parallel to the anisotropy axis than for the perpendicular one by a factor of 1.6. The spin-wave velocity observed at 15 K is higher for the direction parallel to the anisotropy axis than that for the perpendicular direction by a factor of 1.2. These results are similar to that for the $Mn_{0.62}Ni_{0.38}$ alloy. Our results indicate that the magnetic carriers are more localized and the magnetic interactions are less extended in alloys with higher Ni concentration.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 1; 203-205
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Temperature Dependence of Magnetic Inelastic Neutron Scattering in Mn(12%Ge) Alloy
    Autorzy:
    Jankowska-Kisielińska, J.
    Mikke, K.
    Milczarek, J. J.
    Hennion, B.
    Udovenko, V. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1956523.pdf
    Data publikacji:
    1997-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Ds
    75.50.Ee
    Opis:
    A systematic study of temperature dependence of magnetic inelastic neutron scattering for itinerant antiferromagnet Mn(12%Ge) is presented. At low temperatures the experimental data are well described in terms of damped spin waves. This description becomes insufficient at least 150 K below T$\text{}_{N}$. In the temperature range 200-400 K the integrated intensity of distribution for energy transfer 13 THz increases by one third and the shape of the deconvoluted neutron scattering cross-section changes. These changes suggest that ca. 200 K below T$\text{}_{N}$ an additional contribution to the inelastic neutron scattering starts to appear and that its origin is different from spin waves.
    Źródło:
    Acta Physica Polonica A; 1997, 91, 2; 483-486
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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