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Investigation of the Anisotropy in Frozen Nickel Ferrite Ionic Magnetic Fluid Using Magnetic Resonance

โœ Scribed by J.F. Saenger; K. Skeff Neto; P.C. Morais; M.H. Sousa; F.A. Tourinho

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
104 KB
Volume
134
Category
Article
ISSN
1090-7807

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โœฆ Synopsis

Magnetic resonance is used to obtain the temperature dependence of the magnetic anisotropy of noninteracting NiFe 2 O 4 nanoparticles from 100 to 250 K. The 10.3 nm particles are dispersed as a stable ionic magnetic fluid which is frozen under the action of an external field to perform angular variation measurements. The thermal fluctuation of the easy axis and magnetic moment about the direction of the external field is included in order to obtain the anisotropy from the angular dependence of the resonance field.

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