Scopul nostru este sprijinirea şi promovarea cercetării ştiinţifice şi facilitarea comunicării între cercetătorii români din întreaga lume.
Autori: Ovidiu Crisan, Tornau EE, Petrauskas V, Angelakeris M
Editorial: WILEY-VCH VERLAG GMBH, Physica Status Solidi (c), 1, p.3760-3763, 2004.
The magnetic properties of core-shell-type nanoparticles with non-magnetic core and ferromagnetic shell are modeled using Monte Carlo simulation. The influence of the surface spin disorder on the magnetization and Curie temperature of magnetic states is studied. Due to competition between exchange coupling and surface anisotropy, rotation of the magnetization axis is observed, as the surface anisotropy of the ferromagnetic shell is increased. It is shown that the exchange coupling at the core-shell interface can influence the shape of the temperature dependence of total magnetization.
Cuvinte cheie: ferromagnetic nanoparticles, surface anistropy, Monte Carlo simulation