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    Por favor, use este identificador para citar o enlazar este ítem:http://uvadoc.uva.es/handle/10324/37263

    Título
    Synthesis, structural characterization and broadband ferromagnetic resonance in Li ferrite nanoparticles
    Autor
    Hernández Gómez, PabloAutoridad UVA
    Almeida Valente, Manuel
    Fernandes Graça, Manuel Pedro
    Muñoz Muñoz, José MaríaAutoridad UVA
    Año del Documento
    2018
    Editorial
    Elsevier
    Descripción
    Producción Científica
    Documento Fuente
    Journal of Alloys and Compounds, 2018, vol. 765. p. 186-192
    Résumé
    Lithium ferrites are well known materials due to its numerous technological applications especially in microwave devices. Lithium ferrite nanoparticles were prepared by sol-gel technique by means of Pechini method, and then annealed at different temperatures in 250–1000 °C range. XRD confirms spinel formation with particles sizes in 15–700 nm range, with increased size with annealing temperature, whereas FTIR and Raman measurement confirm that single phase lithium ferrite with ordered cationic structure is obtained. Microwave magnetoabsorption data of the annealed lithium ferrite nanoparticles were obtained with a broadband system based on a network analyzer that operates up to 8.5 GHz. At fields up to 200 mT we can observe a broad absorption peak that shifts to higher frequencies with magnetic field according to ferromagnetic resonance theory. The amplitude of absorption, up to 85%, together with the frequency width of about 5.5 GHz makes this material suitable as wave absorber. FMR parameters like resonance field, linewidth and broadening are analyzed in order to obtain the characteristic parameters and analyze the microwave behaviour.
    Materias Unesco
    2202.08 Magnetismo
    Palabras Clave
    Magnetic materials
    Materiales magnéticos
    Nanostructured materials
    Materiales nanoestructurados
    Oxid materials
    Materiales de óxido
    Sol-gel processes
    Procesos sol-gel
    Ferromagnetic resonance
    Resonancia ferromagnética
    ISSN
    0925-8388
    Revisión por pares
    SI
    DOI
    10.1016/j.jallcom.2018.06.172
    Patrocinador
    Ministerio de Economía, Industria y Competitividad ( project MAT2016-80784-P)
    Version del Editor
    https://www.sciencedirect.com/science/article/pii/S092583881832293X
    Propietario de los Derechos
    © 2018 Elsevier
    Idioma
    eng
    URI
    http://uvadoc.uva.es/handle/10324/37263
    Tipo de versión
    info:eu-repo/semantics/submittedVersion
    Derechos
    openAccess
    Aparece en las colecciones
    • DEP22 - Artículos de revista [65]
    • MM - Artículos de Revista [8]
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    Fichier(s) constituant ce document
    Nombre:
    Synthesis-characterization.pdf
    Tamaño:
    739.8Ko
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    Attribution-NonCommercial-NoDerivatives 4.0 InternacionalExcepté là où spécifié autrement, la license de ce document est décrite en tant que Attribution-NonCommercial-NoDerivatives 4.0 Internacional

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