75667 20190709135613.0 doi 10.1103/PhysRevMaterials.2.014402 sideral 104970 ART-2018-104970 eng (orcid)0000-0002-0782-3160 Arias-Egido, E. Microstructural and magnetic characterization of Fe- and Ir-based multilayers 2018 Access copy available to the general public Unrestricted Nominal [Fe(t)/Ir(t'')](n) (M/Mtype), [FeOx(t)/IrOx(t'')](n) (O/O), and [Fe(t)/IrOx(t'')](n) (M/O) multilayers have been prepared by magnetron sputtering at room temperature. Composition, structure, and magnetic behavior have been analyzed. In the M/M samples, the Fe and Ir phases are identified as bcc and fcc, respectively. The magnetism evolves from bulklike iron to granular behavior as the thickness of the Fe layers decreases. An induced magnetic moment, ferromagnetically coupled to Fe, is observed on Ir by x-ray magnetic circular dichroism (XMCD). Besides, the presence of negative remanent magnetization is observed in the M/M samples. As for the M/O samples, the stronger affinity of iron for oxygen displaces the oxygen atoms giving rise to actual heterostructures that strongly differ from the nominal ones. For similar thickness of the two layers the Fe layer become oxidized while a mixture of metal and oxide phases is found in the Ir layer. The increase of the Fe thickness leads to a metallic Ir layer and a highly coercive (similar to 4.4 kOe) core-shell metal-oxide structure in the Fe layers. info:eu-repo/grantAgreement/ES/DGA/NETOSHIMA info:eu-repo/grantAgreement/ES/MINECO/MAT2014-54425-R info:eu-repo/grantAgreement/ES/MINECO/MAT2017-83468-R info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 2.926 2018 MATERIALS SCIENCE, MULTIDISCIPLINARY 105 / 293 = 0.358 2018 Q2 T2 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion (orcid)0000-0003-4069-0395 Laguna-Marco, M.A. Universidad de Zaragoza Sanchez-Marcos, J. (orcid)0000-0003-4239-2949 Piquer, C. Universidad de Zaragoza (orcid)0000-0003-1134-1997 Chaboy, J. Universidad de Zaragoza Avila, M. Lopez, J.G. 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 2, 1 (2018), 014402 [10 pp] Phys. rev. mater. Physical Review Materials 2475-9953 998706 http://zaguan.unizar.es/record/75667/files/texto_completo.pdf Versión publicada 31533 http://zaguan.unizar.es/record/75667/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:75667 articulos driver 2019-07-09-12:23:26 ARTICLE