Study of the hyperfine parameters in Si and Fe doped HfO2 nanoparticles by perturbed angular correlation spectroscopy

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dc.contributor.authorSALES, T.S.N.pt_BR
dc.contributor.authorSAXENA, R.N.pt_BR
dc.contributor.authorCARBONARI, A.W.pt_BR
dc.coverageInternacionalpt_BR
dc.creator.eventoINTERNATIONAL CONFERENCE ON HYPERFINE INTERACTIONS AND THEIR APPLICATIONSpt_BR
dc.date.accessioned2020-06-17T19:34:22Z
dc.date.available2020-06-17T19:34:22Z
dc.date.eventoFebruary 10-15, 2019pt_BR
dc.description.abstractNanoparticles (NPs) have attracted a great deal of interest due to their desirable properties suited for technological and medical applications. Hafnium dioxide (HfO2) can be used in both areas. HfO2 NPs were synthesized through sol-gel method, which allows an efficient and controlled doping of HfO2. In this work, we have investigated the effect of (5% at.) doping of HfO2 NPs with Si and Fe by measuring hyperfine interactions at 181Ta probe nuclei on Hf sites using the perturbed γ–γ angular correlations (PAC) spectroscopy. The structural and morphological analysis was carried out by X-ray diffraction (XRD) and transmission microscopy (TEM) techniques. For both samples, XRD results showed a single phase with the expected monoclinic structure and TEM results indicated NPs with an average diameter of approximately 30 nm. The hyperfine parameters were measured in the temperature range of 200-900 ºC. The radioactive 181Hf was produced by irradiating the samples with neutrons in the IEA-R1 reactor at IPEN. The samples were enclosed in the alumina tube instead of usual silica tube to avoid the formation of hafnon. Results of both samples showed that probe nuclei occupy three sites with different electric quadrupolar interactions. The major fractions (~65%), in both cases however, showed the well-known monoclinic structure of pure HfO2 [1]. The characterization of one of the minor fractions in Si doped HfO2 showing a tetragonal structure between 400-600 ºC is discussed.pt_BR
dc.event.siglaHYPERFINEpt_BR
dc.format.extent83-83pt_BR
dc.identifier.citationSALES, T.S.N.; SAXENA, R.N.; CARBONARI, A.W. Study of the hyperfine parameters in Si and Fe doped HfO2 nanoparticles by perturbed angular correlation spectroscopy. In: INTERNATIONAL CONFERENCE ON HYPERFINE INTERACTIONS AND THEIR APPLICATIONS, February 10-15, 2019, Goa, India. <b>Abstract...</b> Mumbai, India: Tata Institute of Fundamental Research, 2019. p. 83-83. Disponível em: http://repositorio.ipen.br/handle/123456789/31313.
dc.identifier.orcid0000-0002-4499-5949pt_BR
dc.identifier.orcid0000-0003-3023-1718pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-4499-5949
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/31313
dc.localMumbai, Indiapt_BR
dc.local.eventoGoa, Indiapt_BR
dc.publisherTata Institute of Fundamental Researchpt_BR
dc.rightsopenAccesspt_BR
dc.titleStudy of the hyperfine parameters in Si and Fe doped HfO2 nanoparticles by perturbed angular correlation spectroscopypt_BR
dc.typeResumo de eventos científicospt_BR
dspace.entity.typePublication
ipen.autorARTUR WILSON CARBONARI
ipen.autorRAJENDRA NARAIN SAXENA
ipen.autorTATIANE DA SILVA NASCIMENTO
ipen.codigoautor1437
ipen.codigoautor1329
ipen.codigoautor9322
ipen.contributor.ipenauthorARTUR WILSON CARBONARI
ipen.contributor.ipenauthorRAJENDRA NARAIN SAXENA
ipen.contributor.ipenauthorTATIANE DA SILVA NASCIMENTO
ipen.date.recebimento20-06
ipen.event.datapadronizada2019pt_BR
ipen.identifier.ipendoc27091pt_BR
ipen.notas.internasAbstractpt_BR
ipen.type.genreResumo
relation.isAuthorOfPublication8f236231-e73c-4182-a596-d83e49cd0404
relation.isAuthorOfPublicatione8e73f41-f42e-41aa-97a1-c86c5706abe4
relation.isAuthorOfPublication24b79047-b1bf-4409-a205-0d39870c9cfd
relation.isAuthorOfPublication.latestForDiscovery24b79047-b1bf-4409-a205-0d39870c9cfd
sigepi.autor.atividadeCARBONARI, A.W.:1437:310:Npt_BR
sigepi.autor.atividadeSAXENA, R.N.:1329:310:Npt_BR
sigepi.autor.atividadeSALES, T.S.N.:9322:310:Spt_BR
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