Growing and characterization of YBaCo2O5 thin films using dc sputtering technique

The present thesis deals with the investigation of the perovskite related complex cobaltite YBaCo2O5+δ in thin film form. The YBaCo2O5+δ thin films were grown through dc sputtering technique and were characterized after their physical properties using standard characterization techniques. The motiva...

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Autores:
Galeano Marin, Velkis Neivany
Tipo de recurso:
Fecha de publicación:
2015
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/56612
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/56612
http://bdigital.unal.edu.co/52458/
Palabra clave:
53 Física / Physics
Cobaltita
Propiedades Magneticas
Espectroscopia de impedancia
Películas delgadas
Rights
openAccess
License
Atribución-NoComercial 4.0 Internacional
id UNACIONAL2_86d81857fbb2399726c1d36e8db36a08
oai_identifier_str oai:repositorio.unal.edu.co:unal/56612
network_acronym_str UNACIONAL2
network_name_str Universidad Nacional de Colombia
repository_id_str
dc.title.spa.fl_str_mv Growing and characterization of YBaCo2O5 thin films using dc sputtering technique
title Growing and characterization of YBaCo2O5 thin films using dc sputtering technique
spellingShingle Growing and characterization of YBaCo2O5 thin films using dc sputtering technique
53 Física / Physics
Cobaltita
Propiedades Magneticas
Espectroscopia de impedancia
Películas delgadas
title_short Growing and characterization of YBaCo2O5 thin films using dc sputtering technique
title_full Growing and characterization of YBaCo2O5 thin films using dc sputtering technique
title_fullStr Growing and characterization of YBaCo2O5 thin films using dc sputtering technique
title_full_unstemmed Growing and characterization of YBaCo2O5 thin films using dc sputtering technique
title_sort Growing and characterization of YBaCo2O5 thin films using dc sputtering technique
dc.creator.fl_str_mv Galeano Marin, Velkis Neivany
dc.contributor.author.spa.fl_str_mv Galeano Marin, Velkis Neivany
dc.contributor.spa.fl_str_mv Moran Campaña, Jesus Oswaldo
dc.subject.ddc.spa.fl_str_mv 53 Física / Physics
topic 53 Física / Physics
Cobaltita
Propiedades Magneticas
Espectroscopia de impedancia
Películas delgadas
dc.subject.proposal.spa.fl_str_mv Cobaltita
Propiedades Magneticas
Espectroscopia de impedancia
Películas delgadas
description The present thesis deals with the investigation of the perovskite related complex cobaltite YBaCo2O5+δ in thin film form. The YBaCo2O5+δ thin films were grown through dc sputtering technique and were characterized after their physical properties using standard characterization techniques. The motivation for growing thin films is the lacking information concerning the physicochemical behavior of the compound at nano-scale dimensions and the potential applications in gas sensors. The first crucial step to obtain high-quality thin films is the fabrication of high-quality YBaCo2O5+δ targets. In doing so, polycrystalline YBaCo2O5+δ samples were synthesized either by polymeric precursor method or standard solid-state reaction. The polycrystalline samples were carefully characterized according their structural, morphological, electrical, and magnetic properties using standard characterization techniques such as X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), vibrating sample magnetometry and electric transport measurements. The achieved results allow one to determine which of the routes is more suitable for obtaining the compound with the desired phase and meaningless concentration of foreign phases. This information is then used for fabricating the targets of the compound by pressing the powders and subsequent sinter at high temperatures. YBaCo2O5+δ thin films are then sputtered from these targets on (001)-oriented SrTiO3 substrates. The substrate temperature is varied between 750 and 850 °C in order to optimize this important growing parameter. Similar to the polycrystalline material, the films are characterized after their structural, morphological, electrical and magnetic properties using standard characterization methods mentioned above. Additional optical and dielectric characterization of the thin films is performed using UV-visible complex impedance spectroscopy. The results achieved both on polycrystalline and thin film samples are evaluated allowing one to draw important conclusions about the fascinating behavior the complex system.
publishDate 2015
dc.date.issued.spa.fl_str_mv 2015-07-30
dc.date.accessioned.spa.fl_str_mv 2019-07-02T11:59:00Z
dc.date.available.spa.fl_str_mv 2019-07-02T11:59:00Z
dc.type.spa.fl_str_mv Trabajo de grado - Maestría
dc.type.driver.spa.fl_str_mv info:eu-repo/semantics/masterThesis
dc.type.version.spa.fl_str_mv info:eu-repo/semantics/acceptedVersion
dc.type.content.spa.fl_str_mv Text
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status_str acceptedVersion
dc.identifier.uri.none.fl_str_mv https://repositorio.unal.edu.co/handle/unal/56612
dc.identifier.eprints.spa.fl_str_mv http://bdigital.unal.edu.co/52458/
url https://repositorio.unal.edu.co/handle/unal/56612
http://bdigital.unal.edu.co/52458/
dc.language.iso.spa.fl_str_mv spa
language spa
dc.relation.ispartof.spa.fl_str_mv Universidad Nacional de Colombia Sede Medellín Facultad de Ciencias Escuela de Física
Escuela de Física
dc.relation.references.spa.fl_str_mv Galeano Marin, Velkis Neivany (2015) Growing and characterization of YBaCo2O5 thin films using dc sputtering technique. Maestría thesis, Universidad Nacional de Colombia – Sede Medellin.
dc.rights.spa.fl_str_mv Derechos reservados - Universidad Nacional de Colombia
dc.rights.coar.fl_str_mv http://purl.org/coar/access_right/c_abf2
dc.rights.license.spa.fl_str_mv Atribución-NoComercial 4.0 Internacional
dc.rights.uri.spa.fl_str_mv http://creativecommons.org/licenses/by-nc/4.0/
dc.rights.accessrights.spa.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv Atribución-NoComercial 4.0 Internacional
Derechos reservados - Universidad Nacional de Colombia
http://creativecommons.org/licenses/by-nc/4.0/
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eu_rights_str_mv openAccess
dc.format.mimetype.spa.fl_str_mv application/pdf
institution Universidad Nacional de Colombia
bitstream.url.fl_str_mv https://repositorio.unal.edu.co/bitstream/unal/56612/1/1036929143.2015.pdf
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repository.name.fl_str_mv Repositorio Institucional Universidad Nacional de Colombia
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spelling Atribución-NoComercial 4.0 InternacionalDerechos reservados - Universidad Nacional de Colombiahttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Moran Campaña, Jesus OswaldoGaleano Marin, Velkis Neivany5136cd92-3abd-467d-9809-68f02e7015153002019-07-02T11:59:00Z2019-07-02T11:59:00Z2015-07-30https://repositorio.unal.edu.co/handle/unal/56612http://bdigital.unal.edu.co/52458/The present thesis deals with the investigation of the perovskite related complex cobaltite YBaCo2O5+δ in thin film form. The YBaCo2O5+δ thin films were grown through dc sputtering technique and were characterized after their physical properties using standard characterization techniques. The motivation for growing thin films is the lacking information concerning the physicochemical behavior of the compound at nano-scale dimensions and the potential applications in gas sensors. The first crucial step to obtain high-quality thin films is the fabrication of high-quality YBaCo2O5+δ targets. In doing so, polycrystalline YBaCo2O5+δ samples were synthesized either by polymeric precursor method or standard solid-state reaction. The polycrystalline samples were carefully characterized according their structural, morphological, electrical, and magnetic properties using standard characterization techniques such as X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), vibrating sample magnetometry and electric transport measurements. The achieved results allow one to determine which of the routes is more suitable for obtaining the compound with the desired phase and meaningless concentration of foreign phases. This information is then used for fabricating the targets of the compound by pressing the powders and subsequent sinter at high temperatures. YBaCo2O5+δ thin films are then sputtered from these targets on (001)-oriented SrTiO3 substrates. The substrate temperature is varied between 750 and 850 °C in order to optimize this important growing parameter. Similar to the polycrystalline material, the films are characterized after their structural, morphological, electrical and magnetic properties using standard characterization methods mentioned above. Additional optical and dielectric characterization of the thin films is performed using UV-visible complex impedance spectroscopy. The results achieved both on polycrystalline and thin film samples are evaluated allowing one to draw important conclusions about the fascinating behavior the complex system.Resumen: en esta tesis se realiza un estudio de un compuesto tipo perovskita, YBaCo2O5+δ en forma de película delgada que son crecidas utilizando dc sputtering y sus propiedades físicas son caracterizadas utilizando técnicas analíticas de caracterización. La motivación de dicha investigación es los escasos reportes de dicho compuesto en película delgada, teniendo en cuenta el gran potencial de aplicación en sensores de gas. Inicialmente se hace la fabricación del compuesto en fase policristalina para tal proceso se utiliza dos técnicas de síntesis, precursor polimérico y reacción en estado sólido estándar. Posteriormente, las muestras en polvo son caracterizadas de acuerdo a sus propiedades morfológicas, eléctricas y magnéticas a través de difracción de rayos x (DRX), microscopia electrónica de barrido (FESEM), magnetometría de muestra vibrante y medidas de transporte eléctrico. Los resultados obtenidos de tales análisis permiten determinar la técnica más adecuada de síntesis del compuesto, garantizando la fase correcta y la menos cantidad de fases secundarias. Luego se procede a la fabricación del blanco de YBaCo2O5+δ por medio de prensado y un subsecuente tratamiento térmico a altas temperaturas. Las películas de YBaCo2O5+δ son depositadas sobra sustratos orientados de titanato de estroncio, SrTiO3 (001). Con el fin de optimizar el crecimiento se varía la temperatura del sustrato entre 750 y 850°C. De forma similar a lo realizado con las muestras policristalinas, se caracterizan las películas por sus propiedades estructurales, morfológicas, eléctricas y magnéticas con técnicas de caracterización estándar. Adicionalmente, se realiza una caracterización óptica y de impedancia a las películas, a través de espectroscopia de impedancia y UV-visible. Finalmente, se evalúan los resultados obtenidos de las muestras policristalinas y en película delgada lo que permite sacar conclusiones representativas del comportamiento de un sistema tan complejo.Maestríaapplication/pdfspaUniversidad Nacional de Colombia Sede Medellín Facultad de Ciencias Escuela de FísicaEscuela de FísicaGaleano Marin, Velkis Neivany (2015) Growing and characterization of YBaCo2O5 thin films using dc sputtering technique. Maestría thesis, Universidad Nacional de Colombia – Sede Medellin.53 Física / PhysicsCobaltitaPropiedades MagneticasEspectroscopia de impedanciaPelículas delgadasGrowing and characterization of YBaCo2O5 thin films using dc sputtering techniqueTrabajo de grado - Maestríainfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/acceptedVersionTexthttp://purl.org/redcol/resource_type/TMORIGINAL1036929143.2015.pdfTesis de Maestría en Ciencias - Físicaapplication/pdf2698795https://repositorio.unal.edu.co/bitstream/unal/56612/1/1036929143.2015.pdf8502df31c206f2b394199b9668a01c54MD51THUMBNAIL1036929143.2015.pdf.jpg1036929143.2015.pdf.jpgGenerated Thumbnailimage/jpeg4473https://repositorio.unal.edu.co/bitstream/unal/56612/2/1036929143.2015.pdf.jpgbbabb600e96974e077d2b373589ee57fMD52unal/56612oai:repositorio.unal.edu.co:unal/566122023-03-30 16:27:41.852Repositorio Institucional Universidad Nacional de Colombiarepositorio_nal@unal.edu.co