Observation of phonon-induced magnetic deflagration in manganites

Very fast magnetic avalanches in (La, Pr)-based manganites are the signature of a phase transition from an insulating blocked charge-ordered antiferromagnetic state to a charge-delocalized ferromagnetic (CD-FM) state. We report here the experimental observation that this transition does not occur ei...

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Autores: Macià Bros, Ferran, Hernández Mínguez, Alberto, Abril, Guillem, Hernández Ferràs, Joan Manel, García Santiago, Antoni, Tejada Palacios, Javier, Parisi, F., Santos, P. V.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2007
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/10929
Acceso en línea:https://hdl.handle.net/2445/10929
Access Level:acceso abierto
Palabra clave:Materials magnètics
Propietats magnètiques
Magnetic materials
Magnetic properties
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spelling Observation of phonon-induced magnetic deflagration in manganitesMacià Bros, FerranHernández Mínguez, AlbertoAbril, GuillemHernández Ferràs, Joan ManelGarcía Santiago, AntoniTejada Palacios, JavierParisi, F.Santos, P. V.Materials magnèticsPropietats magnètiquesMagnetic materialsMagnetic propertiesVery fast magnetic avalanches in (La, Pr)-based manganites are the signature of a phase transition from an insulating blocked charge-ordered antiferromagnetic state to a charge-delocalized ferromagnetic (CD-FM) state. We report here the experimental observation that this transition does not occur either simultaneously or randomly in the whole sample but there is instead a spatial propagation with a velocity of the order of tens of m/s. Our results show that avalanches originate from the inside of the sample, move to the outside, and occur at values of the applied magnetic field that depend on the CD-FM fraction in the sample. Moreover, upon application of surface acoustic waves at constant magnetic fields, we are able to trigger avalanches at very well-determined values of the temperature and magnetic field. Due to the interaction with the acoustic waves, the number of isolated ferromagnetic clusters in La0.225Pr0.40Ca0.375MnO3 starts to grow across the entire sample in the same way as if it were a magnetic deflagration.The American Physical Society2007info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/10929Articles publicats en revistes (Física de la Matèria Condensada)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.76.174424Physical Review B, 2007, vol. 76, núm. 17, p. 174424-1-174424-8http://dx.doi.org/10.1103/PhysRevB.76.174424(c) The American Physical Society, 2007info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/109292026-05-27T06:46:51Z
dc.title.none.fl_str_mv Observation of phonon-induced magnetic deflagration in manganites
title Observation of phonon-induced magnetic deflagration in manganites
spellingShingle Observation of phonon-induced magnetic deflagration in manganites
Macià Bros, Ferran
Materials magnètics
Propietats magnètiques
Magnetic materials
Magnetic properties
title_short Observation of phonon-induced magnetic deflagration in manganites
title_full Observation of phonon-induced magnetic deflagration in manganites
title_fullStr Observation of phonon-induced magnetic deflagration in manganites
title_full_unstemmed Observation of phonon-induced magnetic deflagration in manganites
title_sort Observation of phonon-induced magnetic deflagration in manganites
dc.creator.none.fl_str_mv Macià Bros, Ferran
Hernández Mínguez, Alberto
Abril, Guillem
Hernández Ferràs, Joan Manel
García Santiago, Antoni
Tejada Palacios, Javier
Parisi, F.
Santos, P. V.
author Macià Bros, Ferran
author_facet Macià Bros, Ferran
Hernández Mínguez, Alberto
Abril, Guillem
Hernández Ferràs, Joan Manel
García Santiago, Antoni
Tejada Palacios, Javier
Parisi, F.
Santos, P. V.
author_role author
author2 Hernández Mínguez, Alberto
Abril, Guillem
Hernández Ferràs, Joan Manel
García Santiago, Antoni
Tejada Palacios, Javier
Parisi, F.
Santos, P. V.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Materials magnètics
Propietats magnètiques
Magnetic materials
Magnetic properties
topic Materials magnètics
Propietats magnètiques
Magnetic materials
Magnetic properties
description Very fast magnetic avalanches in (La, Pr)-based manganites are the signature of a phase transition from an insulating blocked charge-ordered antiferromagnetic state to a charge-delocalized ferromagnetic (CD-FM) state. We report here the experimental observation that this transition does not occur either simultaneously or randomly in the whole sample but there is instead a spatial propagation with a velocity of the order of tens of m/s. Our results show that avalanches originate from the inside of the sample, move to the outside, and occur at values of the applied magnetic field that depend on the CD-FM fraction in the sample. Moreover, upon application of surface acoustic waves at constant magnetic fields, we are able to trigger avalanches at very well-determined values of the temperature and magnetic field. Due to the interaction with the acoustic waves, the number of isolated ferromagnetic clusters in La0.225Pr0.40Ca0.375MnO3 starts to grow across the entire sample in the same way as if it were a magnetic deflagration.
publishDate 2007
dc.date.none.fl_str_mv 2007
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/2445/10929
url https://hdl.handle.net/2445/10929
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.76.174424
Physical Review B, 2007, vol. 76, núm. 17, p. 174424-1-174424-8
http://dx.doi.org/10.1103/PhysRevB.76.174424
dc.rights.none.fl_str_mv (c) The American Physical Society, 2007
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) The American Physical Society, 2007
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 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:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.300719

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