Exotic magnetic anisotropy map in epitaxial La_(0.7)Ca_(0.3)MnO_(3) films on BaTiO_(3)

We report the observation between 40 and 120 K of anomalous magnetic hysteresis loops in thin epitaxial films of La_(0.7)Ca_(0.3)MnO_(3) grown on ferroelectric BaTiO_(3). These hysteresis loops display extremely unusual features: after switching at coercivity, the magnetization overshoots the eventu...

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Detalhes bibliográficos
Autores: Nemes, Norbert Marcel, Tornos, J., León Yebra, Carlos, Santamaría Sánchez-Barriga, Jacobo
Formato: artículo
Fecha de publicación:2011
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/44550
Acesso em linha:https://hdl.handle.net/20.500.14352/44550
Access Level:acceso abierto
Palavra-chave:537
Thin-films
Tunnel-junctions
Strain
Magnetoresistance
Heterostructures
Temperature
Dependence
Stress.
Electricidad
Electrónica (Física)
2202.03 Electricidad
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oai_identifier_str oai:docta.ucm.es:20.500.14352/44550
network_acronym_str ES
network_name_str España
repository_id_str
spelling Exotic magnetic anisotropy map in epitaxial La_(0.7)Ca_(0.3)MnO_(3) films on BaTiO_(3)Nemes, Norbert MarcelTornos, J.León Yebra, CarlosSantamaría Sánchez-Barriga, Jacobo537Thin-filmsTunnel-junctionsStrainMagnetoresistanceHeterostructuresTemperatureDependenceStress.ElectricidadElectrónica (Física)2202.03 ElectricidadWe report the observation between 40 and 120 K of anomalous magnetic hysteresis loops in thin epitaxial films of La_(0.7)Ca_(0.3)MnO_(3) grown on ferroelectric BaTiO_(3). These hysteresis loops display extremely unusual features: after switching at coercivity, the magnetization overshoots the eventual high-field value. We study the strains in the film and substrate with x-ray diffraction and propose a model of two magnetic moment populations with different magnetoelastic anisotropies. The relative weights of both populations can be estimated by comparison with twin samples of La_(0.7)Ca_(0.3)MnO_(3) films on nonferroelectric SrTiO_(3). We propose that the observed magnetization overshoots the result from differences in the magnetostriction balance as the applied magnetic field increases. The picture of a nonuniform strain field in La_(0.7)Ca_(0.3)MnO_(3) on BaTiO_(3), caused by the corrugation of the ferroelectric domains in the rhombohedric phase of BaTiO_(3), is compatible with the magnetic granular behavior observed in the temperature and field dependences of the magnetization as well as in the low temperature magnetoresistance exhibited by the epitaxial film.American Physical SocietyUniversidad Complutense de Madrid20112011-10-0420112011-10-04journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/44550reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/445502026-06-02T12:44:21Z
dc.title.none.fl_str_mv Exotic magnetic anisotropy map in epitaxial La_(0.7)Ca_(0.3)MnO_(3) films on BaTiO_(3)
title Exotic magnetic anisotropy map in epitaxial La_(0.7)Ca_(0.3)MnO_(3) films on BaTiO_(3)
spellingShingle Exotic magnetic anisotropy map in epitaxial La_(0.7)Ca_(0.3)MnO_(3) films on BaTiO_(3)
Nemes, Norbert Marcel
537
Thin-films
Tunnel-junctions
Strain
Magnetoresistance
Heterostructures
Temperature
Dependence
Stress.
Electricidad
Electrónica (Física)
2202.03 Electricidad
title_short Exotic magnetic anisotropy map in epitaxial La_(0.7)Ca_(0.3)MnO_(3) films on BaTiO_(3)
title_full Exotic magnetic anisotropy map in epitaxial La_(0.7)Ca_(0.3)MnO_(3) films on BaTiO_(3)
title_fullStr Exotic magnetic anisotropy map in epitaxial La_(0.7)Ca_(0.3)MnO_(3) films on BaTiO_(3)
title_full_unstemmed Exotic magnetic anisotropy map in epitaxial La_(0.7)Ca_(0.3)MnO_(3) films on BaTiO_(3)
title_sort Exotic magnetic anisotropy map in epitaxial La_(0.7)Ca_(0.3)MnO_(3) films on BaTiO_(3)
dc.creator.none.fl_str_mv Nemes, Norbert Marcel
Tornos, J.
León Yebra, Carlos
Santamaría Sánchez-Barriga, Jacobo
author Nemes, Norbert Marcel
author_facet Nemes, Norbert Marcel
Tornos, J.
León Yebra, Carlos
Santamaría Sánchez-Barriga, Jacobo
author_role author
author2 Tornos, J.
León Yebra, Carlos
Santamaría Sánchez-Barriga, Jacobo
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 537
Thin-films
Tunnel-junctions
Strain
Magnetoresistance
Heterostructures
Temperature
Dependence
Stress.
Electricidad
Electrónica (Física)
2202.03 Electricidad
topic 537
Thin-films
Tunnel-junctions
Strain
Magnetoresistance
Heterostructures
Temperature
Dependence
Stress.
Electricidad
Electrónica (Física)
2202.03 Electricidad
description We report the observation between 40 and 120 K of anomalous magnetic hysteresis loops in thin epitaxial films of La_(0.7)Ca_(0.3)MnO_(3) grown on ferroelectric BaTiO_(3). These hysteresis loops display extremely unusual features: after switching at coercivity, the magnetization overshoots the eventual high-field value. We study the strains in the film and substrate with x-ray diffraction and propose a model of two magnetic moment populations with different magnetoelastic anisotropies. The relative weights of both populations can be estimated by comparison with twin samples of La_(0.7)Ca_(0.3)MnO_(3) films on nonferroelectric SrTiO_(3). We propose that the observed magnetization overshoots the result from differences in the magnetostriction balance as the applied magnetic field increases. The picture of a nonuniform strain field in La_(0.7)Ca_(0.3)MnO_(3) on BaTiO_(3), caused by the corrugation of the ferroelectric domains in the rhombohedric phase of BaTiO_(3), is compatible with the magnetic granular behavior observed in the temperature and field dependences of the magnetization as well as in the low temperature magnetoresistance exhibited by the epitaxial film.
publishDate 2011
dc.date.none.fl_str_mv 2011
2011-10-04
2011
2011-10-04
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/44550
url https://hdl.handle.net/20.500.14352/44550
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869405079355785216
score 15,300719

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