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Wyszukujesz frazę "Wilczynski, M." wg kryterium: Wszystkie pola

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    Tytuł:
    Thermoelectric Effects in Planar Tunnel Junctions
    Autorzy:
    Wilczyński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1427569.pdf
    Data publikacji:
    2012-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    72.20.Pa
    73.40.Gk
    73.40.Rw
    Opis:
    The thermopower and the charge current generated by the finite temperature gradient applied to ferromagnetic planar tunnel junctions are investigated in the spin-polarized free-electron-like one-band model. It has been shown that the current depends almost linearly on the temperature difference between the electrodes while the thermopower does not depend significantly on the temperature gradient. The studied quantities depend on the magnetic configuration of the junction. The form of this dependence is sensitive to the height of the barrier, but is not sensitive to the temperature difference between the electrodes.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 5-6; 1188-1190
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Seebeck Effect in Double Tunnel Junctions with Ferromagnetic Electrodes and Central Layer Separated by Nonmagnetic Barriers
    Autorzy:
    Wilczyński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030503.pdf
    Data publikacji:
    2018-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    72.20.Pa
    73.40.Gk
    73.40.Ty
    73.50.Lw
    Opis:
    The Seebeck effect is analysed in the double planar tunnel junctions consisting of ferromagnetic electrodes and the central layer separated by nonmagnetic barriers with the arbitrary angle between magnetic moments in neighbouring ferromagnetic layers. The Seebeck coefficient is calculated as a function of the thickness of the central layer. The influence of temperature of the junction and the relative orientation of magnetic moments in ferromagnetic layers on this coefficient is also analysed. Calculations are performed in the linear response theory using the free-electron model. It has been found that the Seebeck coefficient oscillates with the thickness of the central layer and can be strongly enhanced in the junction with special central layer thickness due to electron tunnelling by resonant states. The form of the observed oscillations depends on the temperature of the junction. The magnitude of the Seebeck coefficient usually increases with the increase of the angle between magnetic moments in the neighbouring ferromagnetic layers as in the case of single junctions. However, in the junctions with the specially designated central layer the decrease of the magnitude of the Seebeck coefficient with the increase of this angle can be observed.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 3; 544-547
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tunneling Magnetoresistance in Planar Ferromagnetic Junctions
    Autorzy:
    Wilczyński, M.
    Barnaś, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2013036.pdf
    Data publikacji:
    2000-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    72.15.Gd
    73.40.Gk
    75.70.-i
    Opis:
    Bias dependence of the tunnel magnetoresistance in simple planar ferromagnetic junctions is considered theoretically within the one-band model. The limit of sequential tunnelling in double junctions with a non-magnetic central electrode is studied as well. In this case tunnel magnetoresistance exists only when the spin relaxation time due to spin-flip scattering processes inside the central electrode is sufficiently long.
    Źródło:
    Acta Physica Polonica A; 2000, 97, 3; 443-446
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spin Torque in Semiconductor Single Planar Tunnel Junctions
    Autorzy:
    Wilczyński, M.
    Barnaś, J.
    Świrkowicz, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813514.pdf
    Data publikacji:
    2008-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.40.Gk
    73.40.Ty
    Opis:
    Transport in a single planar tunnel junction with electrodes made of a ferromagnetic semiconductor is analyzed theoretically in the zero- -temperature limit. Tunneling current and both (in-plane and out-of-plane) components of the spin torque exerted on one of the ferromagnetic electrodes are determined as a function of the angle\thet a between magnetic moments of the electrodes. The influence of the bias voltage and spin splitting of the electron band (in both electrodes) on the spin torque components is analyzed numerically.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 1; 35-38
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spin Torque in Double Planar Tunnel Junctions
    Autorzy:
    Wilczyński, M.
    Świrkowicz, R.
    Barnaś, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1810520.pdf
    Data publikacji:
    2009-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.40.Gk
    72.25.-b
    Opis:
    Transport in a double planar tunnel junction with ferromagnetic electrodes is analyzed theoretically in the zero-temperature limit. The in-plane and out-of-plane components of the spin torque exerted on magnetic moment of the central layer are determined as a function of the angle θ between magnetic moments of one of the external electrodes and of the central layer. Two configurations of the magnetic moments of external electrodes are considered, i.e. parallel and antiparallel ones. It is found that both torque components depend strongly on the thickness of the central layer, especially in junctions with a relatively thin central layer, where enhancement of the torque or a change of its sign can be observed for specific layer thicknesses. In junctions with thick central layer and in the limit of small bias voltage applied to the junction, the in-plane torque is generally smaller in the parallel configuration than in the antiparallel one. The opposite relation is observed for the normal torque.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 1; 269-271
    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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