Capa do livro de Magnetic and Structural Properties of Nanoparticles
Título do livro:

Magnetic and Structural Properties of Nanoparticles

Superparamagnetic properties of Nickel Oxide

VDM Verlag Dr. Müller (2009-10-06 )

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ISBN- 1 3:

978-3-639-20097-3

ISBN- 1 0:
3639200977
EAN:
9783639200973
Idioma do livro:
Inglês
Anotações e citações/ texto breve:
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.
Editora:
VDM Verlag Dr. Müller
Website:
http://www.vdm-verlag.de
Por (autor):
Jenny H. Shim
Número de páginas:
140
Publicado em:
2009-10-06
Stock:
Disponível
Categoria:
Físicas, astronomia
Preço:
59 €
Palavras chave:
nanoparticles, Magnetism, superparamagnetism, Blocking Temperature, Interparticle interaction, Interparticle interaction

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