2024-03-29T02:15:33Zhttp://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/372642021-06-24T07:31:51Zcom_10324_31951com_10324_954com_10324_894col_10324_31952
Hernández Gómez, Pablo
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500
0000-0003-0323-7495
Muñoz Muñoz, José María
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500
Almeida Valente, Manuel
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500
Fernandes Graça, Manuel Pedro
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2019-07-24T10:45:53Z
2019-07-24T10:45:53Z
2019
Materials Research Bulletin, 2019, vol. 112. p. 432-437
0025-5408
http://uvadoc.uva.es/handle/10324/37264
https://doi.org/10.1016/j.materresbull.2018.09.005
Producción Científica
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.
Ministerio de Economía, Industria y Competitividad, Agencia Estatal de Investigación with FEDER (project MAT2016-80784-P)
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eng
Elsevier
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
© 2018 Elsevier
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Magnetic materials
Materiales magnéticos
Oxide
Óxido
Sol-gel processes
Procesos sol-gel
2202.08 Magnetismo
Broadband ferromagnetic resonance in Mn-doped Li ferrite nanoparticles
info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
https://www.sciencedirect.com/science/article/pii/S0025540817331987
SI
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license.txt
text/plain
3926
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Broadband-ferromagn-resonance.pdf
Broadband-ferromagn-resonance.pdf
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https://uvadoc.uva.es/bitstream/10324/37264/1/Broadband-ferromagn-resonance.pdf
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10324/37264
oai:uvadoc.uva.es:10324/37264
2021-06-24 09:31:51.304
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