FMR study of carbon coated cobalt nanoparticles dispersed in paraffin

Marcin Soboń 1Nikos Guskos 2,3,4Ignacy Lipiński 4Janusz Typek 4Urszula Narkiewicz 5Marcin Podsiadły 5

1. The Faculty of Management and Economics of Services of Szczecin University (US), Cukrowa 8, Szczecin 71-004, Poland
2. National Technical University of Athens (NTUA), Heroon Polytechneiou 9, Athens 157 80, Greece
3. University of Athens, Dept Phys, Solid State Sect,, Zografos 15784,, Athens, Greece
4. Technical University of Szczecin, Institute of Physics (TUS), al. Piastów 48, Szczecin 70-311, Poland
5. Technical University of Szczecin, Institute of Chemical and Environment Engineering, Pulaskiego 10, Szczecin 70-322, Poland

Abstract

Agglomerated cobalt magnetic nanoparticles coated with carbon dispersed in paraffin matrix have been prepared and investigated by FMR (ferromagnetic resonance) at room temperature. Four samples with different C/Co content, ranging from 0.175 to 1.011, dispersed at low concentration in paraffin have been applied. Very intense and broad FMR spectra have been recorded for four samples with different intensities, linewidths and positions of resonance field. A strong dependence of the FMR signal intensity and position on concentration of magnetic nanoparticles has been observed. Various magnetic interactions affecting the observed FMR spectrum have been analyzed. It has been found that the magnetic dipole interaction between agglomerates is playing an important role with increasing concentrations magnetic nanoparticles.

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Presentation: Poster at E-MRS Fall Meeting 2006, Symposium D, by Marcin Soboń
See On-line Journal of E-MRS Fall Meeting 2006

Submitted: 2006-05-15 11:38
Revised:   2009-06-07 00:44
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