Autor: Lévy, J.-C. S. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The Emergence of Subsurface Spin-Waves in fcc (110) Magnetic Films
Autorzy:: Mamica, S.
Puszkarski, H.
Lévy, J.-C. S.
Powiązania:: https://bibliotekanauki.pl/articles/2013076.pdf
Data publikacji:: 2000-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.70.-i
75.40.Gb
75.30.Ds
Opis:: We show that the emergence of subsurface branches in the spin-wave spectra of thin films is due to the deficiency of interactions with next-nearestneighbours, the position vectors of which are oblique to the film surface.
Źródło:: Acta Physica Polonica A; 2000, 97, 3; 483-486
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Magnetic Structures in Ultrathin Films and Nanostructures: Simulation
Autorzy:: Lévy, J.-C. S.
Ghazali, A.
Vedmedenko, E. Yu.
Powiązania:: https://bibliotekanauki.pl/articles/2013038.pdf
Data publikacji:: 2000-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.70.Ak
75.50.Tt
75.60.Ch
75.40.Mg
Opis:: In magnetic ultrathin films and dots, competing exchange, anisotropy and dipolar couplings lead to a large variety of magnetic structures. These structures are obtained by means of the Monte Carlo simulations. Three classes of magnetic structures are obtained according to anisotropy-to-dipolar energy ratio: Ising striped structures, XY-spin structures with vortices, and twisted spin phases at the spin = reorientation transition. Domain wall nucleation and motion at the coercive field are also accessible.
Źródło:: Acta Physica Polonica A; 2000, 97, 3; 431-434
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Ferromagnetic Layered Composites. Transfer Matrix Approach
Autorzy:: Puszkarski, H.
Krawczyk, M.
Lévy, J.-C. S.
Mercier, D.
Powiązania:: https://bibliotekanauki.pl/articles/2030419.pdf
Data publikacji:: 2001-12
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.70.-i
75.30.Ds
02.60.Dc
02.70.Bf
Opis:: A theoretical analysis of spin-wave excitations in a ferromagnetic layered composite (ABAB... ABA; A and B are different homogeneous ferromagnetic materials) is performed by means of the transfer matrix approach. We focus our attention on two features not yet well studied in the present literature, namely, the existence of forbidden energy gaps in the spin-wave mode spectrum, as well as the properties of multilayer spin-wave mode profiles. These features are discussed in relation to several multilayer characteristics, such as the filling fraction, and the exchange or magnetization contrast; surface pinning conditions and dipolar interactions are also taken into account. The existence of forbidden gaps as well as properties of mode profiles are successfully explained by having recourse to an approximate model of independent constituent sublayers. Finally, as a byproduct of our investigation, we ascertain that the conventional test for computational convergence within the finite difference method demands to be completed by symmetry mode profile verification, in addition to standard verification of the frequency convergence alone.
Źródło:: Acta Physica Polonica A; 2001, 100, Supplement; 195-214
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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