- Tytuł:
- Spin-1 Model of Noninteracting Nanoparticles
- Autorzy:
-
Yalçin, O.
Erdem, R.
Övűnç, S. - Powiązania:
- https://bibliotekanauki.pl/articles/1812046.pdf
- Data publikacji:
- 2008-10
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
75.50.Tt
75.60.-d
05.50.+q
05.70.Ln - Opis:
- In this work, we presented a spin-1 model to investigate the magnetic properties of noninteracting monodomain nanoparticles based on the pair approximation. Nearest-neighbor pair interactions are incorporated between the Ising spins in three parts that are core, core-surface, and surface within the nanoparticle. Using the spin-1 Ising model of magnetization in the pair approximation, we calculated the free energy and minimized with respect to pair variables to obtain the field-cooled magnetization. Hysteresis loops of the system were plotted for various values of exchange coupling constants, and axial anisotropy of strength which couples the core, core-surface, and surface regions. The coercive field and its linear fit to the data were plotted as a function of radius of ferromagnetic nanoparticles.
- Źródło:
-
Acta Physica Polonica A; 2008, 114, 4; 835-844
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł