Magnetic field dependence of the magnetocaloric effect in magnetic nanoparticle systems: A Monte Carlo simulation

We study the entropy change dependence on the applied magnetic field for a dipolar interacting superparamagnetic system of fine particles. Using a Monte Carlo technique, we have obtained an enhancement of the entropy for increasing applied magnetic fields; the maximum of the entropy curves occurs at...

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Bibliographic Details
Published in:Journal of non-crystalline solids 2007-04, Vol.353 (8-10), p.793-795
Main Authors: Baldomir, D., Rivas, J., Serantes, D., Pereiro, M., Arias, J.E., Buján-Núñez, M.C., Vázquez-Vázquez, C.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Diamagnetism, paramagnetism and superparamagnetism
Exact sciences and technology
Magnetic properties and materials
Magnetically ordered materials: other intrinsic properties
Magnetocaloric effect, magnetic cooling
Monte Carlo simulations
Nanoparticles
Physics
Small particles and nanoscale materials
Studies of specific magnetic materials
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Summary:We study the entropy change dependence on the applied magnetic field for a dipolar interacting superparamagnetic system of fine particles. Using a Monte Carlo technique, we have obtained an enhancement of the entropy for increasing applied magnetic fields; the maximum of the entropy curves occurs at higher temperatures for larger magnetic fields. It was also observed that the blocking temperature always decreases as the magnetic field increases.
ISSN:0022-3093
1873-4812
DOI:10.1016/j.jnoncrysol.2006.12.042