Naslov
Size distribution of FeNiB nanoparticles

Autori
Lackner, Peter ; Pajić, Damir ; Reissner, Michael ; Novosel, Nikolina ; Zadro, Krešo ; Stöger-Pollach, Michael ; Babić, Emil

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
EPJ Web of Conferences Vol. 75 (2014) / D. Niarchos, G. Hadjipanayis, O. Kalogirou - Lahti : EDP Sciences, 2014, 05008-1

Skup
JEMS 2013 - Joint European Magnetic Symposia

Mjesto i datum
Rodos, Grčka, 25.08.2013. - 30.08.2013

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
magnetic nanoparticles; magnetization; structure; size distribution; ternary amorphous alloys; FeNiB

Sažetak
Two samples of amorphous nanoparticles FeNiB, one of them with SiO2 sheath around the core and one without, were investigated by transmission electron microscopy and magnetic measurements. The coating gives mean particle diameters of 4.3 nm compared to 7.2 nm for the uncoated particles. Magnetic measurements prove superparamagnetic behaviour above 160 K (350 K) for the coated (uncoated) sample. With use of effective anisotropy constant Keff – determined from hysteresis loops – size distributions are determined both from ZFC curves, as well as from relaxation measurements. Both are in good agreement and are very similar for both samples. Comparison with the size distribution determined from TEM pictures shows that magnetic clusters consist of only few physical particles.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA