000065292 001__ 65292
000065292 005__ 20190709135652.0
000065292 0247_ $$2doi$$a10.3390/ma10121390
000065292 0248_ $$2sideral$$a104282
000065292 037__ $$aART-2017-104282
000065292 041__ $$aeng
000065292 100__ $$aVergara, J.
000065292 245__ $$aStructurally oriented nano-sheets in co thin films: Changing their anisotropic physical properties by thermally-induced relaxation
000065292 260__ $$c2017
000065292 5060_ $$aAccess copy available to the general public$$fUnrestricted
000065292 5203_ $$aWe 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.
000065292 536__ $$9info:eu-repo/grantAgreement/ES/MINECO/MAT2017-82970-C2-R
000065292 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000065292 590__ $$a2.467$$b2017
000065292 591__ $$aMATERIALS SCIENCE, MULTIDISCIPLINARY$$b111 / 285 = 0.389$$c2017$$dQ2$$eT2
000065292 592__ $$a0.732$$b2017
000065292 593__ $$aMaterials Science (miscellaneous)$$c2017$$dQ2
000065292 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000065292 700__ $$aFavieres, C.
000065292 700__ $$0(orcid)0000-0002-6761-6171$$aMagén, C.$$uUniversidad de Zaragoza
000065292 700__ $$0(orcid)0000-0001-9566-0738$$ade Teresa, J.M.$$uUniversidad de Zaragoza
000065292 700__ $$0(orcid)0000-0003-0681-8260$$aIbarra, M.R.$$uUniversidad de Zaragoza
000065292 700__ $$aMadurga, V.
000065292 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada
000065292 773__ $$g10, 12 (2017), 1390 [15 pp]$$pMATERIALS$$tMATERIALS$$x1996-1944
000065292 8564_ $$s1356641$$uhttps://zaguan.unizar.es/record/65292/files/texto_completo.pdf$$yVersión publicada
000065292 8564_ $$s106635$$uhttps://zaguan.unizar.es/record/65292/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000065292 909CO $$ooai:zaguan.unizar.es:65292$$particulos$$pdriver
000065292 951__ $$a2019-07-09-12:44:07
000065292 980__ $$aARTICLE