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    Wyświetlanie 1-6 z 6
    Tytuł:
    Depth-Resolved XMCD Study of Ultrathin Mo/Co/Au Films
    Autorzy:
    Sakamaki, M.
    Abe, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1810551.pdf
    Data publikacji:
    2009-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Gw
    75.70.Cn
    78.70.Dm
    Opis:
    The effect of Mo overlayer on the magnetism of ultrathin Co films grown on Au(111) was studied. The structure and magnetism at the Mo/Co interface were studied by means of depth-resolved X-ray magnetic circular dichroism. The magnetic moment of Co near the Mo/Co interface was reduced in comparison to the inner part of the film for the samples which have in-plane anisotropy. This effect is more prominent in the case of Mo overlayer with higher roughness, and can be attributed to Co-Mo intermixing at the interface.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 1; 309-311
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spin Wave Characteristics of Inhomogeneous Ferromagnetic Layered Composites
    Autorzy:
    Urbaniak-Kucharczyk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030250.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.70.-i
    75.70.Cn
    75.30.Ds
    75.30.Gw
    Opis:
    A ferromagnetic layered composite ABAB...ABA with nonuniform distribution of anisotropy parameter is studied. The effects of damping leading to non-zero line-width of ferromagnetic resonance peaks are also taken into account. As a result the dependence of spin wave parameter B and resonance line-width on parameters characterizing system under consideration were obtained for the case of uniform anisotropy parameter and for quadratic distribution of this parameter in magnetic layers, respectively.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 854-856
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Asymmetric Magnetization Reversal in the Exchange-Biased MnO/(Ga,Mn)As Heterostructure Studied by Ferromagnetic Resonance
    Autorzy:
    Dziatkowski, K.
    Ge, Z.
    Liu, X.
    Furdyna, J. K.
    Twardowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2046987.pdf
    Data publikacji:
    2006-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Pp
    76.50.+g
    75.30.Gw
    75.70.Cn
    Opis:
    We report ferromagnetic resonance study of the magnetization reversal in the exchange-coupled MnO/(Ga,Mn)As system. The low-field parts of ferromagnetic resonance spectra measured along [1/10] and [100] directions of (Ga,Mn)As were combined into hysteresis loops, which under field-cooling conditions similarly to SQUID loops are shifted toward negative magnetic fields. The magnetization reversal process revealed by the loops occurred remarkably asymmetric for both sample configurations.
    Źródło:
    Acta Physica Polonica A; 2006, 110, 3; 319-324
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Additions and Stratification on the Magnetic Properties and Out-of-Plane Texture of Nd-Fe-B Films
    Autorzy:
    Grigoras, M.
    Lupu, N.
    Chiriac, H.
    Borza, F.
    Urse, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1368477.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Gw
    75.50.Cc
    75.50.Vv
    75.70.Ak
    75.70.Cn
    Opis:
    Nd-Fe-B films with Ta and Mo additions used as buffer and capping layers and as interlayers have been deposited by r.f. sputtering on heated Si(111) substrates at 370°C and 470°C, and subsequently annealed at temperatures between 550°C and 650°C. In comparison with the Ta/NdFeB/Ta film, the Mo/NdFeB/Mo film deposited at 470°C presents an obvious anisotropic character. Very good anisotropic magnetic properties were obtained for Mo/[NdFeB(180)/Mo(5)]×3/Mo multilayer film deposited at 470°C and then annealed at 550°C. This sample exhibits an increase in coercivity from 1225 kA/m up to 1651.8 kA/m, increase in $M_{r}$/$M_{s}$ ratio from 0.90 up to 0.99, and increase in the maximum energy product from 60.4 to 121.6 kJ/$m^{3}$ as compared to the as-deposited Mo/NdFeB/Mo film. The results demonstrate that after annealing at 550°C the Mo film is more effective for nucleation of $Nd_{2}Fe_{14}B$ hard magnetic grains with c-axis perpendicular to the film plane, especially in multilayer variant.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 220-221
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exchange Coupled NiFe/NiMn Bilayer Studied by a Vector Network Analyzer Ferromagnetic Resonance
    Autorzy:
    Głowiński, H.
    Załęski, K.
    Sprada, J.
    Dubowik, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1427432.pdf
    Data publikacji:
    2012-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.70.-i
    75.30.Et
    75.30.Gw
    75.70.Cn
    76.50.+g
    Opis:
    Using cavity ferromagnetic resonance and vector network analyzer ferromagnetic resonance unidirectional, uniaxial and rotatable anisotropies were determined in permalloy(30 nm)/NiMn(56 nm). Resonance field dependence on in-plane angle clearly shows unidirectional and uniaxial anisotropy. Rotatable anisotropy, which acts as internal magnetic field independent of a direction of external magnetic field, is observed on vector network analyzer ferromagnetic resonance as upward shift of the resonance frequency of Py/NiMn compared to Py film. Even for a small exchange bias field, this shift is significantly large.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 5-6; 1145-1147
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interval Identification of FMR Parameters for Spin Reorientation Transition in (Ga,Mn)As
    Autorzy:
    Gutowski, M.
    Stefanowicz, W.
    Proselkov, O.
    Sawicki, M.
    Żuberek, R.
    Sadowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1428597.pdf
    Data publikacji:
    2012-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    07.05.Kf
    68.47.Fg
    75.30.Gw
    75.50.Pp
    75.70.-i
    75.70.Ak
    75.70.Cn
    75.70.Rf
    76.50.+g
    Opis:
    In this work we report results of ferromagnetic resonance studies of a 6% 15nm (Ga,Mn)As layer, deposited on (001)-oriented GaAs. The measurements were performed with in-plane oriented magnetic field, in the temperature range between 5 K and 120 K. We observe a temperature induced reorientation of the effective in-plane easy axis from $[\overline{1}10]$ to [110] direction close to the Curie temperature. The behavior of magnetization is described by anisotropy fields, $H_{eff}$ (=4π $M-H_{2⊥}$), $H_{2∥},$ and $H_{4∥}$. In order to precisely investigate this reorientation, numerical values of anisotropy fields have been determined using powerful - but still largely unknown - interval calculations. In simulation mode this approach makes possible to find all the resonance fields for arbitrarily oriented sample, which is generally intractable analytically. In "fitting" mode we effectively utilize full experimental information, not only those measurements performed in special, distinguished directions, to reliably estimate the values of important physical parameters as well as their uncertainties and correlations.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 5-6; 1228-1230
    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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