Study of carbon-doped Mn3Ga thin films with enhanced magnetization

Carbon-doped Mn3Ga thin films were grown on Si/SiO2 substrates using rf magnetron sputtering technique and they present an enhancement of their magnetization. In this work we focus on the structural stress, theoretical calculations and magnetization analysis (using both Bloch's and Kneller'...

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Detalles Bibliográficos
Autores: Holguín Momaca, José Trinidad, Gutiérrez Pérez, Rocío Margarita, Reyes Rojas, Armando, Espinosa Magaña, Francisco, López Antón, Ricardo
Tipo de recurso: artículo
Fecha de publicación:2019
País:España
Institución:Universidad de Castilla-La Mancha
Repositorio:RUIdeRA. Repositorio Institucional de la UCLM
OAI Identifier:oai:ruidera.uclm.es:10578/21860
Acceso en línea:http://hdl.handle.net/10578/21860
Access Level:acceso abierto
Palabra clave:Thin films and multilayers
Magnetic properties
Point defect
Density functional theory
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spelling Study of carbon-doped Mn3Ga thin films with enhanced magnetizationHolguín Momaca, José TrinidadGutiérrez Pérez, Rocío MargaritaReyes Rojas, ArmandoEspinosa Magaña, FranciscoLópez Antón, RicardoThin films and multilayersMagnetic propertiesPoint defectDensity functional theoryCarbon-doped Mn3Ga thin films were grown on Si/SiO2 substrates using rf magnetron sputtering technique and they present an enhancement of their magnetization. In this work we focus on the structural stress, theoretical calculations and magnetization analysis (using both Bloch's and Kneller's laws). The residual stress component has been calculated by means of x-ray diffraction in gracing incidence, using the ? method for multiple crystallographic reflections. We have observed an increase of the cell volume or positive (tensile) strain, which is higher near the surface of the film. The existence of induced magnetism in Mn3GaC0.25, with C entering in interstitial positions has been investigated by first-principles calculations, using the projector-augmented-wave method, within the generalized gradient approximation. Spin charge distributions and magnetic moments associated with each ion, were analyzed by performing a Bader charge analysis. Noteworthily, in spite of being a thin film, the magnetic behavior of the sample can be well described considering it formed by magnetic nanoparticles. Magnetic field and temperature dependence of the magnetization measurements were used to evaluate the Bloch and Kneller exponents, showing that dipolar interactions take place between Mn3GaC0.25 nanoparticlesElsevier201920192019info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttp://hdl.handle.net/10578/21860reponame:RUIdeRA. Repositorio Institucional de la UCLMinstname:Universidad de Castilla-La ManchaInglésinfo:eu-repo/semantics/openAccessoai:ruidera.uclm.es:10578/218602026-05-27T07:36:41Z
dc.title.none.fl_str_mv Study of carbon-doped Mn3Ga thin films with enhanced magnetization
title Study of carbon-doped Mn3Ga thin films with enhanced magnetization
spellingShingle Study of carbon-doped Mn3Ga thin films with enhanced magnetization
Holguín Momaca, José Trinidad
Thin films and multilayers
Magnetic properties
Point defect
Density functional theory
title_short Study of carbon-doped Mn3Ga thin films with enhanced magnetization
title_full Study of carbon-doped Mn3Ga thin films with enhanced magnetization
title_fullStr Study of carbon-doped Mn3Ga thin films with enhanced magnetization
title_full_unstemmed Study of carbon-doped Mn3Ga thin films with enhanced magnetization
title_sort Study of carbon-doped Mn3Ga thin films with enhanced magnetization
dc.creator.none.fl_str_mv Holguín Momaca, José Trinidad
Gutiérrez Pérez, Rocío Margarita
Reyes Rojas, Armando
Espinosa Magaña, Francisco
López Antón, Ricardo
author Holguín Momaca, José Trinidad
author_facet Holguín Momaca, José Trinidad
Gutiérrez Pérez, Rocío Margarita
Reyes Rojas, Armando
Espinosa Magaña, Francisco
López Antón, Ricardo
author_role author
author2 Gutiérrez Pérez, Rocío Margarita
Reyes Rojas, Armando
Espinosa Magaña, Francisco
López Antón, Ricardo
author2_role author
author
author
author
dc.subject.none.fl_str_mv Thin films and multilayers
Magnetic properties
Point defect
Density functional theory
topic Thin films and multilayers
Magnetic properties
Point defect
Density functional theory
description Carbon-doped Mn3Ga thin films were grown on Si/SiO2 substrates using rf magnetron sputtering technique and they present an enhancement of their magnetization. In this work we focus on the structural stress, theoretical calculations and magnetization analysis (using both Bloch's and Kneller's laws). The residual stress component has been calculated by means of x-ray diffraction in gracing incidence, using the ? method for multiple crystallographic reflections. We have observed an increase of the cell volume or positive (tensile) strain, which is higher near the surface of the film. The existence of induced magnetism in Mn3GaC0.25, with C entering in interstitial positions has been investigated by first-principles calculations, using the projector-augmented-wave method, within the generalized gradient approximation. Spin charge distributions and magnetic moments associated with each ion, were analyzed by performing a Bader charge analysis. Noteworthily, in spite of being a thin film, the magnetic behavior of the sample can be well described considering it formed by magnetic nanoparticles. Magnetic field and temperature dependence of the magnetization measurements were used to evaluate the Bloch and Kneller exponents, showing that dipolar interactions take place between Mn3GaC0.25 nanoparticles
publishDate 2019
dc.date.none.fl_str_mv 2019
2019
2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10578/21860
url http://hdl.handle.net/10578/21860
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:RUIdeRA. Repositorio Institucional de la UCLM
instname:Universidad de Castilla-La Mancha
instname_str Universidad de Castilla-La Mancha
reponame_str RUIdeRA. Repositorio Institucional de la UCLM
collection RUIdeRA. Repositorio Institucional de la UCLM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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