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    Por favor, use este identificador para citar o enlazar este ítem:http://uvadoc.uva.es/handle/10324/37264

    Título
    Broadband ferromagnetic resonance in Mn-doped Li ferrite nanoparticles
    Autor
    Hernández Gómez, PabloAutoridad UVA
    Muñoz Muñoz, José MaríaAutoridad UVA
    Almeida Valente, Manuel
    Fernandes Graça, Manuel Pedro
    Año del Documento
    2019
    Editorial
    Elsevier
    Descripción
    Producción Científica
    Documento Fuente
    Materials Research Bulletin, 2019, vol. 112. p. 432-437
    Abstract
    Lithium ferrites are well known materials due to their numerous technological applications especially in microwave devices. Mn-doped 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 particle size in the 15–200 nm range, with increased size with annealing temperature. Microwave magnetoabsorption data of annealed lithium ferrite nanoparticles, obtained with a broadband system based on a network analyzer operating up to 8.5 GHz are presented. At fields up to 200 m T 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 4.5 GHz makes this material suitable as wave absorber. Samples annealed at higher temperatures show a behaviour similar to polycrystalline samples, thus suggesting their multidomain character.
    Materias Unesco
    2202.08 Magnetismo
    Palabras Clave
    Magnetic materials
    Materiales magnéticos
    Oxide
    Óxido
    Sol-gel processes
    Procesos sol-gel
    ISSN
    0025-5408
    Revisión por pares
    SI
    DOI
    10.1016/j.materresbull.2018.09.005
    Patrocinador
    Ministerio de Economía, Industria y Competitividad, Agencia Estatal de Investigación with FEDER (project MAT2016-80784-P)
    Version del Editor
    https://www.sciencedirect.com/science/article/pii/S0025540817331987
    Propietario de los Derechos
    © 2018 Elsevier
    Idioma
    eng
    URI
    http://uvadoc.uva.es/handle/10324/37264
    Tipo de versión
    info:eu-repo/semantics/acceptedVersion
    Derechos
    openAccess
    Collections
    • DEP22 - Artículos de revista [65]
    • MM - Artículos de Revista [8]
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    Attribution-NonCommercial-NoDerivatives 4.0 InternacionalExcept where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 Internacional

    Universidad de Valladolid

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