Autor: Levy, C. - Prolib Integro

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.
Tematy:: 75.70.-i
75.40.Gb
75.30.Ds; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/2013076.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 2.

Tytuł:: Magnetic Structures in Ultrathin Films and Nanostructures: Simulation
Autorzy:: Lévy, J.-C. S.
Ghazali, A.
Vedmedenko, E. Yu.
Tematy:: 75.70.Ak
75.50.Tt
75.60.Ch
75.40.Mg; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/2013038.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 3.

Tytuł:: Ferromagnetic Layered Composites. Transfer Matrix Approach
Autorzy:: Puszkarski, H.
Krawczyk, M.
Lévy, J.-C. S.
Mercier, D.
Tematy:: 75.70.-i
75.30.Ds
02.60.Dc
02.70.Bf; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/2030419.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki