Couverture de Magnetic and Structural Properties of Nanoparticles
Titre du livre:

Magnetic and Structural Properties of Nanoparticles

Superparamagnetic properties of Nickel Oxide

VDM Verlag Dr. Müller (06-10-2009 )

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ISBN-13:

978-3-639-20097-3

ISBN-10:
3639200977
EAN:
9783639200973
Langue du livre:
Anglais
texte du rabat:
Magnetic properties of NiO nanoparticles prepared by the sol-gel method in the size range D=5 nm to 20 nm, with and without oleic acid coating, are reported. For the coated and uncoated NiO nanorods of 5 nm diameter, variations of the magnetization M with temperature T (5 K to 370 K) and temperature variations of the EMR (electron magnetic resonance) spectra were measured to determine the respective blocking temperatures. For all the particles, measurements of M versus T in the zero-field cooled (ZFC) and field-cooled (FC) modes are used to determine the average blocking temperature Tp. For the OA coated particle, Tp increases with increase in size D as expected for superparamagnetic particles. However for the uncoated NP, Tp decreases initially with increase in size for D 10 nm, but for D 10 nm, Tp follows the same trend as for the coated NP. These differences are interpreted in terms of significant interparticle interaction.
Maison d'édition:
VDM Verlag Dr. Müller
Site Web:
http://www.vdm-verlag.de
de (auteur) :
Jenny H. Shim
Numéro de pages:
140
Publié le:
06-10-2009
Stock:
Disponible
Catégorie:
Physique, Astronomie
Prix:
92.04 S$
Mots-clés:
nanoparticles, Magnetism, superparamagnetism, Blocking Temperature, Interparticle interaction, Interparticle interaction

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