Magnetic relaxation in small-particle systems: ln(t/tau0) scaling

Although most of the experimental work dealing with the magnetic relaxation of systems characterized by the existence of an energy-barrier distribution have been analyzed in terms of the so-called logarithmic approximation, this is not a good approximation because obviously it cannot describe the be...

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Authors: Labarta, Amílcar, Iglesias, Òscar, Balcells i Argemí, Lluís, Badia, Ferran
Format: article
Status:Published version
Publication Date:1993
Country:España
Institution:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repository:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/9946
Online Access:https://hdl.handle.net/2445/9946
Access Level:Open access
Keyword:Magnetisme
Fenòmens de relaxació
Magnetism
Relaxation phenomena
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spelling Magnetic relaxation in small-particle systems: ln(t/tau0) scalingLabarta, AmílcarIglesias, ÒscarBalcells i Argemí, LluísBadia, FerranMagnetismeFenòmens de relaxacióMagnetismRelaxation phenomenaAlthough most of the experimental work dealing with the magnetic relaxation of systems characterized by the existence of an energy-barrier distribution have been analyzed in terms of the so-called logarithmic approximation, this is not a good approximation because obviously it cannot describe the behavior for the whole range of temperatures and times. An alternative method called ln(t/τ0) scaling is proposed. This scaling method allows one to extrapolate the relaxation behavior at times that are experimentally completely unaccessible. From this scaling it is also possible to determine the attempt frequency 1/τ0, and if a certain distribution of energy barriers is assumed the width σ and the mean energy barrier is also obtained. The validity of the logarithmic approximation is critically discussed.The American Physical Society200920091993info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion7 p.application/pdfhttps://hdl.handle.net/2445/9946Articles publicats en revistes (Física de la Matèria Condensada)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.48.10240Physical Review B, 1993, vol. 48, núm. 14, p. 10240-10246.http://dx.doi.org/10.1103/PhysRevB.48.10240(c) The American Physical Society, 1993info:eu-repo/semantics/openAccessoai:recercat.cat:2445/99462026-05-29T05:05:01Z
dc.title.none.fl_str_mv Magnetic relaxation in small-particle systems: ln(t/tau0) scaling
title Magnetic relaxation in small-particle systems: ln(t/tau0) scaling
spellingShingle Magnetic relaxation in small-particle systems: ln(t/tau0) scaling
Labarta, Amílcar
Magnetisme
Fenòmens de relaxació
Magnetism
Relaxation phenomena
title_short Magnetic relaxation in small-particle systems: ln(t/tau0) scaling
title_full Magnetic relaxation in small-particle systems: ln(t/tau0) scaling
title_fullStr Magnetic relaxation in small-particle systems: ln(t/tau0) scaling
title_full_unstemmed Magnetic relaxation in small-particle systems: ln(t/tau0) scaling
title_sort Magnetic relaxation in small-particle systems: ln(t/tau0) scaling
dc.creator.none.fl_str_mv Labarta, Amílcar
Iglesias, Òscar
Balcells i Argemí, Lluís
Badia, Ferran
author Labarta, Amílcar
author_facet Labarta, Amílcar
Iglesias, Òscar
Balcells i Argemí, Lluís
Badia, Ferran
author_role author
author2 Iglesias, Òscar
Balcells i Argemí, Lluís
Badia, Ferran
author2_role author
author
author
dc.subject.none.fl_str_mv Magnetisme
Fenòmens de relaxació
Magnetism
Relaxation phenomena
topic Magnetisme
Fenòmens de relaxació
Magnetism
Relaxation phenomena
description Although most of the experimental work dealing with the magnetic relaxation of systems characterized by the existence of an energy-barrier distribution have been analyzed in terms of the so-called logarithmic approximation, this is not a good approximation because obviously it cannot describe the behavior for the whole range of temperatures and times. An alternative method called ln(t/τ0) scaling is proposed. This scaling method allows one to extrapolate the relaxation behavior at times that are experimentally completely unaccessible. From this scaling it is also possible to determine the attempt frequency 1/τ0, and if a certain distribution of energy barriers is assumed the width σ and the mean energy barrier is also obtained. The validity of the logarithmic approximation is critically discussed.
publishDate 1993
dc.date.none.fl_str_mv 1993
2009
2009
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/9946
url https://hdl.handle.net/2445/9946
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.48.10240
Physical Review B, 1993, vol. 48, núm. 14, p. 10240-10246.
http://dx.doi.org/10.1103/PhysRevB.48.10240
dc.rights.none.fl_str_mv (c) The American Physical Society, 1993
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) The American Physical Society, 1993
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 7 p.
application/pdf
dc.publisher.none.fl_str_mv The American Physical Society
publisher.none.fl_str_mv The American Physical Society
dc.source.none.fl_str_mv Articles publicats en revistes (Física de la Matèria Condensada)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.812429

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