Mössbauer spectroscopy, superparamagnetism and ferrofluids

Detalhes bibliográficos
Autor(a) principal: Pfannes,H.-D.
Data de Publicação: 2001
Outros Autores: Dias Filho,J. H., Magalhães-Paniago,R., López,J. L., Paniago,R.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Brazilian Journal of Physics
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332001000300011
Resumo: Some fundamentals of Mössbauer spectroscopy and of fluctuating magnetic hyperfine interactions are reviewed. An expression for calculation of spin-phonon interaction transition probabilities on the ground of a Debye model is given. Basic ideas of superparamagnetism and classical results for low-temperature relaxation rates are presented. A theory of superparamagnetism based on spin-phonon interaction is introduced. It is shown how to calculate from this Mössbauer spectra taking all spin-levels into account. Experimental spectra of ferrofluids are compared with simulated spectra and found in good accordance.
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spelling Mössbauer spectroscopy, superparamagnetism and ferrofluidsSome fundamentals of Mössbauer spectroscopy and of fluctuating magnetic hyperfine interactions are reviewed. An expression for calculation of spin-phonon interaction transition probabilities on the ground of a Debye model is given. Basic ideas of superparamagnetism and classical results for low-temperature relaxation rates are presented. A theory of superparamagnetism based on spin-phonon interaction is introduced. It is shown how to calculate from this Mössbauer spectra taking all spin-levels into account. Experimental spectra of ferrofluids are compared with simulated spectra and found in good accordance.Sociedade Brasileira de Física2001-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332001000300011Brazilian Journal of Physics v.31 n.3 2001reponame:Brazilian Journal of Physicsinstname:Sociedade Brasileira de Física (SBF)instacron:SBF10.1590/S0103-97332001000300011info:eu-repo/semantics/openAccessPfannes,H.-D.Dias Filho,J. H.Magalhães-Paniago,R.López,J. L.Paniago,R.eng2015-11-26T00:00:00Zoai:scielo:S0103-97332001000300011Revistahttp://www.sbfisica.org.br/v1/home/index.php/pt/ONGhttps://old.scielo.br/oai/scielo-oai.phpsbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br1678-44480103-9733opendoar:2015-11-26T00:00Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF)false
dc.title.none.fl_str_mv Mössbauer spectroscopy, superparamagnetism and ferrofluids
title Mössbauer spectroscopy, superparamagnetism and ferrofluids
spellingShingle Mössbauer spectroscopy, superparamagnetism and ferrofluids
Pfannes,H.-D.
title_short Mössbauer spectroscopy, superparamagnetism and ferrofluids
title_full Mössbauer spectroscopy, superparamagnetism and ferrofluids
title_fullStr Mössbauer spectroscopy, superparamagnetism and ferrofluids
title_full_unstemmed Mössbauer spectroscopy, superparamagnetism and ferrofluids
title_sort Mössbauer spectroscopy, superparamagnetism and ferrofluids
author Pfannes,H.-D.
author_facet Pfannes,H.-D.
Dias Filho,J. H.
Magalhães-Paniago,R.
López,J. L.
Paniago,R.
author_role author
author2 Dias Filho,J. H.
Magalhães-Paniago,R.
López,J. L.
Paniago,R.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Pfannes,H.-D.
Dias Filho,J. H.
Magalhães-Paniago,R.
López,J. L.
Paniago,R.
description Some fundamentals of Mössbauer spectroscopy and of fluctuating magnetic hyperfine interactions are reviewed. An expression for calculation of spin-phonon interaction transition probabilities on the ground of a Debye model is given. Basic ideas of superparamagnetism and classical results for low-temperature relaxation rates are presented. A theory of superparamagnetism based on spin-phonon interaction is introduced. It is shown how to calculate from this Mössbauer spectra taking all spin-levels into account. Experimental spectra of ferrofluids are compared with simulated spectra and found in good accordance.
publishDate 2001
dc.date.none.fl_str_mv 2001-09-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332001000300011
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332001000300011
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-97332001000300011
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Física
publisher.none.fl_str_mv Sociedade Brasileira de Física
dc.source.none.fl_str_mv Brazilian Journal of Physics v.31 n.3 2001
reponame:Brazilian Journal of Physics
instname:Sociedade Brasileira de Física (SBF)
instacron:SBF
instname_str Sociedade Brasileira de Física (SBF)
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institution SBF
reponame_str Brazilian Journal of Physics
collection Brazilian Journal of Physics
repository.name.fl_str_mv Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF)
repository.mail.fl_str_mv sbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br
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