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dc.creatorVergara Platero, Josées_ES
dc.creatorFavieres Ruiz, Cristinaes_ES
dc.creatorMagén, Césares_ES
dc.creatorTeresa, José María dees_ES
dc.creatorIbarra, Manuel Ricardoes_ES
dc.creatorMadurga Pérez, Vicentees_ES
dc.date.accessioned2018-09-05T12:23:25Z
dc.date.available2018-09-05T12:23:25Z
dc.date.issued2017
dc.identifier.issn1996-1944
dc.identifier.urihttps://hdl.handle.net/2454/30519
dc.description.abstractWe show how nanocrystalline Co films formed by separated oblique nano-sheets display anisotropy in their resistivity, magnetization process, surface nano-morphology and optical transmission. After performing a heat treatment at 270 °C, these anisotropies decrease. This loss has been monitored measuring the resistivity as a function of temperature. The resistivity measured parallel to the direction of the nano-sheets has been constant up to 270 °C, but it decreases when measured perpendicular to the nano-sheets. This suggests the existence of a structural relaxation, which produces the change of the Co nano-sheets during annealing. The changes in the nano-morphology and the local chemical composition of the films at the nanoscale after heating above 270 °C have been analysed by scanning transmission electron microscopy (STEM). Thus, an approach and coalescence of the nano-sheets have been directly visualized. The spectrum of activation energies of this structural relaxation has indicated that the coalescence of the nano-sheets has taken place between 1.2 and 1.7 eV. In addition, an increase in the size of the nano-crystals has occurred in the samples annealed at 400 °C. This study may be relevant for the application in devices working, for example, in the GHz range and to achieve the retention of the anisotropy of these films at higher temperatures.en
dc.description.sponsorshipC.M., J.M.d.T. and M.R.I. acknowledge the financial support from the Spanish Ministerio de Economía y Competitividad in the project MAT2017-82970-C2-R.en
dc.format.extent15 p.
dc.format.mimetypeapplication/pdfen
dc.language.isoengen
dc.publisherMDPIen
dc.relation.ispartofMaterials, 2017, 10, 1390en
dc.rights© 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution.en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectNanocrystalsen
dc.subjectAnisotropy resistivityen
dc.subjectMagneticen
dc.subjectOpticen
dc.subjectMorphologicalen
dc.subjectNano-sheetsen
dc.subjectSTEM-EELSen
dc.subjectStructural relaxationen
dc.subjectActivation energyen
dc.subjectLaser deposition PLDen
dc.titleStructurally oriented nano-sheets in Co thin films: changing their anisotropic physical properties by thermally-induced relaxationen
dc.typeinfo:eu-repo/semantics/articleen
dc.typeArtículo / Artikuluaes
dc.contributor.departmentInaMat - Institute for Advanced Materialsen
dc.contributor.departmentUniversidad Pública de Navarra. Departamento de Físicaes_ES
dc.contributor.departmentNafarroako Unibertsitate Publikoa. Fisika Sailaeu
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessen
dc.rights.accessRightsAcceso abierto / Sarbide irekiaes
dc.identifier.doi10.3390/ma10121390
dc.relation.projectIDinfo:eu-repo/grantAgreement/ES/2PE/MAT2017-82970
dc.relation.publisherversionhttps://doi.org/10.3390/ma10121390
dc.type.versioninfo:eu-repo/semantics/publishedVersionen
dc.type.versionVersión publicada / Argitaratu den bertsioaes


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© 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution.
La licencia del ítem se describe como © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution.