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Effect of weak dipolar interaction on the magnetic properties of Ni nanoparticles assembly analyzed with different protocols

Authors :
José Rivas
S. H. Masunaga
R. F. Jardim
Source :
Journal of Applied Physics. 109:07B521
Publication Year :
2011
Publisher :
AIP Publishing, 2011.

Abstract

The effect of weak dipolar interactions (DIs) between Ni nanoparticles (NPs) in samples with different Ni concentrations was investigated by performing a detailed characterization of their structural and magnetic properties. From the determination of several physical parameters of Ni NP assemblies, it was found that the ac and dc magnetic susceptibility measurements are valuable for identifying the DIs between NPs while hysteresis loops measurements showed to be very insensitive, provided that the strength of the DI field is much smaller than the maximum coercive field. Therefore, the sensitivity of the observed static and dynamical magnetic properties to the effect of weak DI depends on the measurement protocols used.

Details

ISSN :
10897550 and 00218979
Volume :
109
Database :
OpenAIRE
Journal :
Journal of Applied Physics
Accession number :
edsair.doi...........e784199808023312da4861e989f7f463
Full Text :
https://doi.org/10.1063/1.3556767