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Type: Artigo de periódico
Title: Effects Of Dipolar Interactions On The Magnetic Properties Of γ-fe2o3 Nanoparticles In The Blocked State
Author: Nunes W.C.
Cebollada F.
Knobel M.
Zanchet D.
Abstract: The role played by dipolar interactions in the coercive field and remanence of nanoparticle systems is studied using different concentrations of nearly monodisperse nanoparticles of γ- Fe2 O3. The 9.0 nm particles are isolated by organic encapsulation and diluted in paraffin. Magnetic properties were investigated by means of hysteresis obtained at different temperatures, zero-field-cooled (ZFC) and field-cooled (FC) magnetization curves, and the so-called ΔM technique. The analysis of the experimental data points to the existence of a demagnetizing role played by the dipolar interaction in the coercive field. © 2006 American Institute of Physics.
Rights: aberto
Identifier DOI: 10.1063/1.2164418
Date Issue: 2006
Appears in Collections:Unicamp - Artigos e Outros Documentos

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