Uniform excitations in magnetic nanoparticles

We present a short review of the magnetic excitations in nanoparticles below the superparamagnetic blocking temperature. In this temperature regime, the magnetic dynamics in nanoparticles is dominated by uniform excitations, and this leads to a linear temperature dependence of the magnetization and...

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Detalles Bibliográficos
Autores principales: Mørup, Steen, Frandsen, Cathrine, Hansen, Mikkel Fougt
Formato: Texto
Lenguaje:English
Publicado: Beilstein-Institut 2010
Materias:
Review
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3045916/
https://www.ncbi.nlm.nih.gov/pubmed/21977393
http://dx.doi.org/10.3762/bjnano.1.6
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author Mørup, Steen
Frandsen, Cathrine
Hansen, Mikkel Fougt
author_facet Mørup, Steen
Frandsen, Cathrine
Hansen, Mikkel Fougt
author_sort Mørup, Steen
collection PubMed
description We present a short review of the magnetic excitations in nanoparticles below the superparamagnetic blocking temperature. In this temperature regime, the magnetic dynamics in nanoparticles is dominated by uniform excitations, and this leads to a linear temperature dependence of the magnetization and the magnetic hyperfine field, in contrast to the Bloch T(3/2) law in bulk materials. The temperature dependence of the average magnetization is conveniently studied by Mössbauer spectroscopy. The energy of the uniform excitations of magnetic nanoparticles can be studied by inelastic neutron scattering.
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spelling pubmed-30459162011-10-05 Uniform excitations in magnetic nanoparticles Mørup, Steen Frandsen, Cathrine Hansen, Mikkel Fougt Beilstein J Nanotechnol Review We present a short review of the magnetic excitations in nanoparticles below the superparamagnetic blocking temperature. In this temperature regime, the magnetic dynamics in nanoparticles is dominated by uniform excitations, and this leads to a linear temperature dependence of the magnetization and the magnetic hyperfine field, in contrast to the Bloch T(3/2) law in bulk materials. The temperature dependence of the average magnetization is conveniently studied by Mössbauer spectroscopy. The energy of the uniform excitations of magnetic nanoparticles can be studied by inelastic neutron scattering. Beilstein-Institut 2010-11-22 /pmc/articles/PMC3045916/ /pubmed/21977393 http://dx.doi.org/10.3762/bjnano.1.6 Text en Copyright © 2010, Mørup et al. https://creativecommons.org/licenses/by/2.0https://www.beilstein-journals.org/bjnano/termsThis is an Open Access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The license is subject to the Beilstein Journal of Nanotechnology terms and conditions: (https://www.beilstein-journals.org/bjnano/terms)
spellingShingle Review
Mørup, Steen
Frandsen, Cathrine
Hansen, Mikkel Fougt
Uniform excitations in magnetic nanoparticles
title Uniform excitations in magnetic nanoparticles
title_full Uniform excitations in magnetic nanoparticles
title_fullStr Uniform excitations in magnetic nanoparticles
title_full_unstemmed Uniform excitations in magnetic nanoparticles
title_short Uniform excitations in magnetic nanoparticles
title_sort uniform excitations in magnetic nanoparticles
topic Review
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3045916/
https://www.ncbi.nlm.nih.gov/pubmed/21977393
http://dx.doi.org/10.3762/bjnano.1.6
work_keys_str_mv AT mørupsteen uniformexcitationsinmagneticnanoparticles
AT frandsencathrine uniformexcitationsinmagneticnanoparticles
AT hansenmikkelfougt uniformexcitationsinmagneticnanoparticles

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