Relaxation Mössbauer Spectroscopy of Iron Oxides Nanoparticles in Superferrimagnetic Regime

V. M. Cherepanov; M. A. Chuev; M. A. Polikarpov; S. Yu. Shishkov

doi:10.4028/www.scientific.net/SSP.190.455

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HomeSolid State PhenomenaSolid State Phenomena Vol. 190Relaxation Mössbauer Spectroscopy of Iron Oxides...

Relaxation Mössbauer Spectroscopy of Iron Oxides Nanoparticles in Superferrimagnetic Regime

Abstract:

Film composites based on magnetite Fe₃O₄nanoparticles in the polyvinyl alcohol (PVA) matrix and the dried ferrofluid ARA-250 (Chemicell GmbH, Germany) were studied at temperatures 78-300 K by Mössbauer spectroscopy and magnetic measurements in magnetic fields H < 5 kOe. The Mössbauer spectra taken in magnetic fields show essential restoration of the magnetic hyperfine structure characteristic for the nanoparticles. The experimental Mössbauer spectra have been analyzed within the recently developed three-level [ and multi-level [ relaxation models of magnetic dynamics in an ensemble of single-domain particles. These models take into account the precession and diffusion of particles uniform magnetization as well as the particles size distribution and interparticle interactions.

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Periodical:

Solid State Phenomena (Volume 190)

Pages:

455-458

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.190.455

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Online since:

June 2012

Authors:

V. M. Cherepanov, M. A. Chuev, M. A. Polikarpov, S. Yu. Shishkov

Keywords:

Iron Oxides, Magnetic Relaxation, Mössbauer Spectroscopy, Nanocomposite

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