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Pregled bibliografske jedinice broj: 222150

Superparamagnetism of Magnetic Nano-Clusters in Hf-Fe Amorphous Alloy


Pajić, Damir; Zadro, Krešo
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)


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, 27.6.-1.7.2005

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



POVEZANOST RADA


Projekt / tema
0119258

Ustanove
Prirodoslovno-matematički fakultet, Zagreb

Autor s matičnim brojem:
Damir Pajić, (234522)
Krešo Zadro, (74153)