Unconventional magnetic behavior of iron-oxide nanoparticles in polymeric matrices

We report the results of magnetization and Fe57 Mössbauer spectroscopy measurements performed in the temperature range 5–300 K on composites containing iron–oxide nanoparticles encased in polystyrene type resins. After carrying out a suitable field treatment in order to decouple the particles from t...

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Bibliographic Details
Published in:Journal of applied physics 2001-08, Vol.90 (3), p.1534-1539
Main Authors: Testa, A. M., Foglia, S., Suber, L., Fiorani, D., Casas, Ll, Roig, A., Molins, E., Grenèche, J. M., Tejada, J.
Format: Article
Language:English
Subjects:
Ciència dels materials
Ferric oxide
Magnetic properties
Materials science
Nanopartícules
Organometallic chemistry
Propietats magnètiques
Química organometàl·lica
Òxid de ferro
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Summary:We report the results of magnetization and Fe57 Mössbauer spectroscopy measurements performed in the temperature range 5–300 K on composites containing iron–oxide nanoparticles encased in polystyrene type resins. After carrying out a suitable field treatment in order to decouple the particles from the matrix, a fraction of the particles freely rotate in response to an applied magnetic field.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.1383019