Pregled bibliografske jedinice broj: 222150
Superparamagnetism of Magnetic Nano-Clusters in Hf-Fe Amorphous Alloy
Superparamagnetism of Magnetic Nano-Clusters in Hf-Fe Amorphous Alloy // Conference on Single Molecule Magnets and Hybrid Magnetic Nanostructures
Trst, Italija, 2005. (poster, nije recenziran, neobjavljeni rad, znanstveni)
CROSBI ID: 222150 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Superparamagnetism of Magnetic Nano-Clusters in Hf-Fe Amorphous Alloy
Autori
Pajić, Damir ; Zadro, Krešo
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, neobjavljeni rad, znanstveni
Skup
Conference on Single Molecule Magnets and Hybrid Magnetic Nanostructures
Mjesto i datum
Trst, Italija, 27.06.2005. - 01.07.2005
Vrsta sudjelovanja
Poster
Vrsta recenzije
Nije recenziran
Ključne riječi
Superparamagnetism; magnetic nano-clusters
Sažetak
The magnetic behaviour of the amorphous alloy Hf(57)Fe(43) is expected to be superparamagnetic. The iron concentration is just below the threshold for establishing magnetic long range order in Hf(100-x)Fe(x) amorphous system. Relatively large magnetic moments of iron nanoclusters formed in the nonmagnetic host are the origin of superparamagnetic behaviour. Detailed measurements including magnetic hysteresis loops, dependence of magnetic moment on temperature and the relaxation of magnetization are performed. They confirm the blocking of magnetic moments of superparamagnetic clusters at lower temperatures. This is accompanied by slow temperature-dependent magnetic relaxation. Using the model of thermal relaxation it is found that clusters are of the approximate size 15-20nm. Quantum tunneling of their magnetic moments was not observed down to 1.8K.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
