Magnetic properties of nickel nanoparticles embedded in amorphous Al2O3 matrix (CROSBI ID 634150)
Prilog sa skupa u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Novosel, Nikolina ; Reissner, Michael ; Zadro, Krešo ; Pajić, Damir ; Jerčinović, Marko ; Buljan, Maja ; Radić, Nikola
engleski
Magnetic properties of nickel nanoparticles embedded in amorphous Al2O3 matrix
Multilayer thin films consisting of 10 bilayers of (Al2O3+Ni)/Al2O3 were deposited by magnetron sputtering onto Si(100) substrate. Nickel nanoparticles are formed inside amorphous alumina matrix by self-assembly growth process. It was determined by GISAXS measurements that nickel particles are spheroidal with diameter < 3 nm and that they form paracrystal-like body-centered tetragonal lattice. Magnetic properties of the prepared thin films were studied. Due to the nanometer size of nickel particles, their magnetic structure is single domain and they show superparamagnetic behaviour. Anisotropy of magnetic properties was observed when magnetic field is applied parallel or perpendicular to the thin film surface and it was attributed to dipole-dipole interactions between particles. This was confirmed using simulations of the M(H) curve of the 2D superlattice of the identical superparamagnetic particles, which was performed using Monte Carlo method and Metropolis algorithm.
Superparamagnetism; dipole-dipole interaction; nickel nanoparticles; magnetron sputtering
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Podaci o prilogu
042022-1-042022-5.
2014.
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objavljeno
Podaci o matičnoj publikaciji
Journal of physics. Conference series
IOP Publishing
1742-6588
Podaci o skupu
27th International Conference on Low Temperature Physics
poster
06.08.2014-13.08.2014
Buenos Aires, Argentina