Title :
Magnetic properties in é¬-FeSi2 nanoparticles
Author :
Chen, Y. ; Wang, Y.
Author_Institution :
Acad. Sinica, Taipei
Abstract :
The study of magnetization on beta-FeSi2 nanoparticles with particle size of 15 nm, 22 nm and 75 nm confirmed that semiconducting beta-FeSi2 became superparamagnetic as it was reduced into nanoparticles. The superparamagnetic characteristics were identified by the irreversible magnetization and blocking temperatures of FC and ZFC measurements. The correlations among blocking temperature, anisotropic constant and particle size were studied, the enhancement of anisotropic constant with size decrease was conjectured to be attributed to the size effects.
Keywords :
ball milling; ferromagnetic materials; iron alloys; laser ablation; magnetic anisotropy; magnetic particles; nanoparticles; particle size; silicon alloys; size effect; superparamagnetism; FeSi2; anisotropic constant; ball milling; commercial SQUID; irreversible magnetization; laser ablation; magnetic nanoparticles; particle size; semiconducting nanoparticles; size 15 nm; size 22 nm; size 75 nm; size effects; superparamagnetism; Anisotropic magnetoresistance; Gas lasers; Laser ablation; Magnetic properties; Magnetic susceptibility; Magnetization; Nanoparticles; Physics; Temperature; X-ray lasers;
Conference_Titel :
Magnetics Conference, 2006. INTERMAG 2006. IEEE International
Conference_Location :
San Diego, CA
Print_ISBN :
1-4244-1479-2
DOI :
10.1109/INTMAG.2006.375529
