Vanadium trapped by oblique nano-sheets to preserve the anisotropy in Co-V thin films at high temperature

Favieres Ruiz, Cristina; Vergara Platero, José; Magén, César; Ibarra, Manuel Ricardo; Madurga Pérez, Vicente

Publication:
Vanadium trapped by oblique nano-sheets to preserve the anisotropy in Co-V thin films at high temperature

dc.contributor.author	Favieres Ruiz, Cristina
dc.contributor.author	Vergara Platero, José
dc.contributor.author	Magén, César
dc.contributor.author	Ibarra, Manuel Ricardo
dc.contributor.author	Madurga Pérez, Vicente
dc.contributor.department	Zientziak	eu
dc.contributor.department	Institute for Advanced Materials and Mathematics - INAMAT2	en
dc.contributor.department	Ciencias	es_ES
dc.contributor.funder	Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa	es
dc.date.accessioned	2022-05-27T08:33:49Z
dc.date.available	2022-05-27T08:33:49Z
dc.date.issued	2022
dc.date.updated	2022-05-27T08:33:48Z
dc.description.abstract	In this study, oriented nano-sheets generated during the growth of cobalt-rich Co–V and Co–Zn thin films induced a large anisotropy in the magnetic and transport properties. The regular nano-sheets were tilted 52–54 deg. with respect to the substrate plane, ≈ 3.0–4.0 nm thick, ≈ 30–100 nm wide, and ≈ 200–300 nm long, with an inter-sheet distance of ≈ 0.9–1.2 nm. In spite of the different microstructures of the two kinds of samples where the Co–V films were amorphous, whereas the Co–Zn films showed a growth of Zn nanocrystals, the oblique nano-sheet morphology conferred noticeable shape anisotropy to both specimens. This anisotropy resulted in an in-plane uniaxial magnetic anisotropy. The changes in the nano-morphology caused by thermal treatments, and hence in their anisotropic properties, were studied. While the Co–V samples retained or increased their magnetic and transport anisotropies, this anisotropic behavior vanished for the annealed Co–Zn films. High resolution transmission electron microscopy, HRTEM, including chemical analysis at the nano-scale, and the dependence of the anisotropic resistance on temperature allowed to establish the nature and the activation energy spectra of the atomic relaxation processes during heating. These processes displayed a single peak at 1.63 eV for the Co–V and two peaks at 1.67 and 2.0 eV for the Co–Zn. These spectra and their singularities were associated to the changes induced in the nano-morphology of the films by thermal treatments. The Co–V films retained their nano-sheet morphology almost up to 500 ºC; the Co–Zn films lost their nano-sheets at 290 ºC. The thermal stability exhibited by the Co–V films makes them useful for applications in ultra high frequency, optical, magnetostrictive and magnetoelectric devices.	en
dc.description.sponsorship	C. F., J. V., and V. M. acknowledge the financial support of the Public University of Navarre. C.M. and M.R.I. acknowledge the financial support from the Spanish Ministerio de Economía y Competitividad in the project MAT2017–82970-C1 and C2-R and from the Aragón Regional project E26. Open access funding provided by Universidad Pública de Navarra.	en
dc.format.extent	12 p.
dc.format.mimetype	application/pdf	en
dc.identifier.citation	Favieres, C.; Vergara, J.; Magén, C.; Ibarra, M. R.; Madurga, V.. (2022). Vanadium trapped by oblique nano-sheets to preserve the anisotropy in Co-V thin films at high temperature. Journal of Alloys and Compounds: an interdisciplinary journal of materials science and solid-state chemistry and physics.. 911, 1-12 .	en
dc.identifier.doi	10.1016/j.jallcom.2022.164950
dc.identifier.issn	0925-8388
dc.identifier.uri	https://academica-e.unavarra.es/handle/2454/43041
dc.language.iso	eng	en
dc.publisher	Elsevier	en
dc.relation.ispartof	Journal of Alloys and Compounds 911 (2022) 164950	en
dc.relation.projectID	info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2017-82182-R/ES/	en
dc.relation.projectID	info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2017-82182-R/ES/	en
dc.relation.publisherversion	https://doi.org/10.1016/j.jallcom.2022.164950
dc.rights	© 2022 The Author(s). Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)	en
dc.rights.accessRights	info:eu-repo/semantics/openAccess
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject	Thin films	en
dc.subject	Nano-fabrications	en
dc.subject	Anisotropy	en
dc.subject	Electrical transport	en
dc.subject	Scanning tunnelling microscopy, STM	en
dc.subject	Transmission electron microscopy, TEM	en
dc.subject	Electron energy loss spectroscopy, EELS	en
dc.title	Vanadium trapped by oblique nano-sheets to preserve the anisotropy in Co-V thin films at high temperature	en
dc.type	info:eu-repo/semantics/article
dc.type.version	info:eu-repo/semantics/publishedVersion	en
dc.type.version	Versión publicada / Argitaratu den bertsioa	es
dspace.entity.type	Publication
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