Magnetic properties of iron nanoparticle
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Date
2010Author
Carvell, Jeff
Gavrin, Andrew
Ayieta, Elijah
Cheng, Ruihua
Type
ArticleLanguage
enMetadata
Show full item recordAbstract
Magnetic properties of Fe nanoparticles with different sizes synthesized by a physical deposition technique have been investigated experimentally. We have used a high pressure sputtering technique to deposit iron nanoparticles on a silicon substrate. The nanoparticles are then analyzed using atomic force microscopy (AFM), transmission electron microscopy (TEM), and superconducting quantum interference device techniques. TEM and AFM data show that the particle size could be tuned by adjusting the deposition conditions. The magnetic properties have been investigated from temperature dependent magnetization M(T) and field dependent magnetization M(H) measurements. The results show that two phases including both ferromagnetic and superparamagnetic particles are present in our system. From these data we extracted the superparamagnetic critical size to be 9 nm for our samples. Ferromagnetic particles are single magnetic domain particles and the magnetic properties can be explained by the Stoner and Wohlfarth model. For the superparamagnetic phase, the effective anisotropy constant, Keff, decreases as the particle size increases
URI
https://www.researchgate.net/publication/253765550_Magnetic_properties_of_iron_nanoparticle/link/54a6d1500cf267bdb909f19f/downloadhttp://erepository.uonbi.ac.ke/handle/11295/155272
Citation
J Carvell, E Ayieta, A Gavrin RCVRSSP, A Gavrin, Ruihua Cheng, Shah VR, Sokol P. "Magnetic properties of iron nanoparticle." Journal of Applied Physics. 2010;107(10):103913.Publisher
University of Nairobi
Subject
Magnetic propertiesRights
Attribution-NonCommercial-NoDerivs 3.0 United StatesUsage Rights
http://creativecommons.org/licenses/by-nc-nd/3.0/us/Collections
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