Aspectos estructurales y propiedades magnéticas de la Ferrobismutita de Disprosio Dy2Bi2Fe4O12

diagramas, ilustraciones a color, fotografías, tablas

Autores:: Nieto Camacho, Johann Andrés

Tipo de recurso:

Fecha de publicación:: 2021

Institución:: Universidad Nacional de Colombia

Repositorio:: Universidad Nacional de Colombia

Idioma:: spa

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dc.title.spa.fl_str_mv	Aspectos estructurales y propiedades magnéticas de la Ferrobismutita de Disprosio Dy2Bi2Fe4O12
dc.title.translated.eng.fl_str_mv	Structural aspects and magnetic properties of Dysprosium Ferrobismutite Dy2Bi2Fe4O12
title	Aspectos estructurales y propiedades magnéticas de la Ferrobismutita de Disprosio Dy2Bi2Fe4O12
spellingShingle	Aspectos estructurales y propiedades magnéticas de la Ferrobismutita de Disprosio Dy2Bi2Fe4O12 530 - Física::538 - Magnetismo Ferromagnetismo Ferromagnetism Propiedades magnéticas Magnetic properties Perovskita Perovskita doble Estructura cristalina perovskita semiconductora propiedades magnéticas caracterización estructural gap óptico Crystal structure Ferromagnetic perovskite-like material Structural and morphological analysis Electric feature Semiconductor character Optical band gap Soft ferromagnet
title_short	Aspectos estructurales y propiedades magnéticas de la Ferrobismutita de Disprosio Dy2Bi2Fe4O12
title_full	Aspectos estructurales y propiedades magnéticas de la Ferrobismutita de Disprosio Dy2Bi2Fe4O12
title_fullStr	Aspectos estructurales y propiedades magnéticas de la Ferrobismutita de Disprosio Dy2Bi2Fe4O12
title_full_unstemmed	Aspectos estructurales y propiedades magnéticas de la Ferrobismutita de Disprosio Dy2Bi2Fe4O12
title_sort	Aspectos estructurales y propiedades magnéticas de la Ferrobismutita de Disprosio Dy2Bi2Fe4O12
dc.creator.fl_str_mv	Nieto Camacho, Johann Andrés
dc.contributor.advisor.none.fl_str_mv	Roa Rojas, Jairo
dc.contributor.author.none.fl_str_mv	Nieto Camacho, Johann Andrés
dc.contributor.researchgroup.spa.fl_str_mv	Grupo de Física de Nuevos Materiales
dc.subject.ddc.spa.fl_str_mv	530 - Física::538 - Magnetismo
topic	530 - Física::538 - Magnetismo Ferromagnetismo Ferromagnetism Propiedades magnéticas Magnetic properties Perovskita Perovskita doble Estructura cristalina perovskita semiconductora propiedades magnéticas caracterización estructural gap óptico Crystal structure Ferromagnetic perovskite-like material Structural and morphological analysis Electric feature Semiconductor character Optical band gap Soft ferromagnet
dc.subject.other.none.fl_str_mv	Ferromagnetismo Ferromagnetism Propiedades magnéticas Magnetic properties
dc.subject.proposal.spa.fl_str_mv	Perovskita Perovskita doble Estructura cristalina perovskita semiconductora propiedades magnéticas caracterización estructural gap óptico
dc.subject.proposal.eng.fl_str_mv	Crystal structure Ferromagnetic perovskite-like material Structural and morphological analysis Electric feature Semiconductor character Optical band gap Soft ferromagnet
description	diagramas, ilustraciones a color, fotografías, tablas
publishDate	2021
dc.date.accessioned.none.fl_str_mv	2021-05-31T22:23:24Z
dc.date.available.none.fl_str_mv	2021-05-31T22:23:24Z
dc.date.issued.none.fl_str_mv	2021-01-20
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
dc.type.redcol.spa.fl_str_mv	http://purl.org/redcol/resource_type/TM
status_str	acceptedVersion
dc.identifier.uri.none.fl_str_mv	https://repositorio.unal.edu.co/handle/unal/79581
dc.identifier.instname.spa.fl_str_mv	Universidad Nacional de Colombia
dc.identifier.reponame.spa.fl_str_mv	Repositorio Institucional Universidad Nacional de Colombia
dc.identifier.repourl.spa.fl_str_mv	https://repositorio.unal.edu.co/
url	https://repositorio.unal.edu.co/handle/unal/79581 https://repositorio.unal.edu.co/
identifier_str_mv	Universidad Nacional de Colombia Repositorio Institucional Universidad Nacional de Colombia
dc.language.iso.spa.fl_str_mv	spa
language	spa
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dc.format.extent.spa.fl_str_mv	1 recurso en línea (88 páginas)
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dc.publisher.spa.fl_str_mv	Universidad Nacional de Colombia
dc.publisher.program.spa.fl_str_mv	Bogotá - Ciencias - Maestría en Ciencias - Física
dc.publisher.department.spa.fl_str_mv	Departamento de Física
dc.publisher.faculty.spa.fl_str_mv	Facultad de Ciencias
dc.publisher.place.spa.fl_str_mv	Bogotá
dc.publisher.branch.spa.fl_str_mv	Universidad Nacional de Colombia - Sede Bogotá
institution	Universidad Nacional de Colombia
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spelling	Atribución-NoComercial-SinDerivadas 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Roa Rojas, Jairo2e10826bd7af55149f1d326253c3336fNieto Camacho, Johann Andrés2fb65d794398a8dd8fede40d315d6d57Grupo de Física de Nuevos Materiales2021-05-31T22:23:24Z2021-05-31T22:23:24Z2021-01-20https://repositorio.unal.edu.co/handle/unal/79581Universidad Nacional de ColombiaRepositorio Institucional Universidad Nacional de Colombiahttps://repositorio.unal.edu.co/diagramas, ilustraciones a color, fotografías, tablasEl material de tipo perovskita doble Dy2Bi2Fe4O12 fue sintetizado a partir de la técnica de estado sólido. La caracterización estructural, mediante difracción de rayos x, revela un cristal ortorrómbico perteneciente al grupo espacial Pnma (#62) con fuertes distorsiones octaédricas. El análisis morfológico mediante SEM muestra una difusión granular con tamaños promedios del orden nanométrico. El espectro de energía por dispersión de rayos X señala que no hay elementos diferentes a los esperados de los óxidos precursores y en la proporción estequiométrica calculada. La determinación de la banda prohibida Eg=1.88 eV, a partir de espectroscopía por reflectancia difusa, clasifica a Dy2Bi2Fe4O12 como un material semiconductor. Las curvas de corriente contra voltaje sugieren una respuesta eléctrica no lineal de tipo varistor. Además, su permitividad eléctrica está marcada por polarización de tipo Maxwell-Wagner. La respuesta magnética clasifica a esta perovskita doble como un ferromagneto blando con bajo campo coercitivo (500 Oe < HC < 700 Oe) y magnetización remanente (2.15x10-4 emu/g < MR < 3.25x10-4 emu/g). Las curvas de histéresis muestran un comportamiento ferromagnético con evidencia de efectos superparamagnéticos debido a la presencia de granos nanométricos ferromagnéticos.Double perovskite-like material Dy2Bi2Fe4O12 has been obtain using the solid-state synthesis Structural characterization through X-ray diffraction technique reveals an orthorhombic crystal belonging to Pnma space group (# 62) with strong octahedral distortions. Analysis of the Morphology by SEM shows a granular diffusion with nanometric order mean sizes. X-ray energy dispersion spectra establishes that there are no elements other than those expected from the precursor oxides in the stoichiometric proportions calculated. Determination of the band gap Eg = 1.88 eV from diffuse reflectance spectroscopy classifies Dy2Bi2Fe4O12 as a semiconductor material. The I-V curves suggest a non-linear varistor-type electrical response. Furthermore, its electrical permittivity is marked by Maxwell-Wagner-type polarization. The magnetic response of the material shows a soft ferromagnet with low coercive field (500 Oe < HC <700 Oe) and remnant magnetization (2.15x10-4 emu/g < MR <3.25x10-4 emu/g). Hysteresis curves reveal a ferromagnetic response with evidence of superparamagnetic effects due to the significant presence of nano-sized ferromagnetic grains.MaestríaMagíster en Ciencias - FísicaCaracterización y Síntesis de Nuevos Materiales1 recurso en línea (88 páginas)application/pdfspaUniversidad Nacional de ColombiaBogotá - Ciencias - Maestría en Ciencias - FísicaDepartamento de FísicaFacultad de CienciasBogotáUniversidad Nacional de Colombia - Sede Bogotá530 - Física::538 - MagnetismoFerromagnetismoFerromagnetismPropiedades magnéticasMagnetic propertiesPerovskitaPerovskita dobleEstructura cristalinaperovskita semiconductorapropiedades magnéticascaracterización estructuralgap ópticoCrystal structureFerromagnetic perovskite-like materialStructural and morphological analysisElectric featureSemiconductor characterOptical band gapSoft ferromagnetAspectos estructurales y propiedades magnéticas de la Ferrobismutita de Disprosio Dy2Bi2Fe4O12Structural aspects and magnetic properties of Dysprosium Ferrobismutite Dy2Bi2Fe4O12Trabajo de grado - Maestríainfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/acceptedVersionTexthttp://purl.org/redcol/resource_type/TM[1] G. 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Lett., vol. 11, no. 7, pp. 2577–2584, Apr. 2020, doi: 10.1021/acs.jpclett.0c00034.LICENSElicense.txtlicense.txttext/plain; charset=utf-83964https://repositorio.unal.edu.co/bitstream/unal/79581/1/license.txtcccfe52f796b7c63423298c2d3365fc6MD51ORIGINAL1012406518.2021.pdf1012406518.2021.pdfTesis de Maestría en Ciencias - Físicaapplication/pdf2257968https://repositorio.unal.edu.co/bitstream/unal/79581/2/1012406518.2021.pdfb5f50b97126d231ebb352684259eeffaMD52THUMBNAIL1012406518.2021.pdf.jpg1012406518.2021.pdf.jpgGenerated Thumbnailimage/jpeg4704https://repositorio.unal.edu.co/bitstream/unal/79581/3/1012406518.2021.pdf.jpg97f93b2231ad86edb17b6eb51b4d15c8MD53unal/79581oai:repositorio.unal.edu.co:unal/795812024-07-20 23:10:52.388Repositorio Institucional Universidad Nacional de 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Aspectos estructurales y propiedades magnéticas de la Ferrobismutita de Disprosio Dy2Bi2Fe4O12

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