69740 20190709135538.0 doi 10.3762/bjnano.8.210 sideral 104819 ART-2017-104819 eng (orcid)0000-0002-4123-487X Sangiao, S. Universidad de Zaragoza Magnetic properties of optimized cobalt nanospheres grown by focused electron beam induced deposition (FEBID) on cantilever tips 2017 Access copy available to the general public Unrestricted In this work, we present a detailed investigation of the magnetic properties of cobalt nanospheres grown on cantilever tips by focused electron beam induced deposition (FEBID). The cantilevers are extremely soft and the cobalt nanospheres are optimized for magnetic resonance force microscopy (MRFM) experiments, which implies that the cobalt nanospheres must be as small as possible while bearing high saturation magnetization. It was found that the cobalt content and the corresponding saturation magnetization of the nanospheres decrease for nanosphere diameters less than 300 nm. Electron holography measurements show the formation of a magnetic vortex state in remanence, which nicely agrees with magnetic hysteresis loops performed by local magnetometry showing negligible remanent magnetization. As investigated by local magnetometry, optimal behavior for high-resolution MRFM has been found for cobalt nanospheres with a diameter of ˜200 nm, which present atomic cobalt content of ˜83 atom % and saturation magnetization of 106 A/m, around 70% of the bulk value. These results represent the first comprehensive investigation of the magnetic properties of cobalt nanospheres grown by FEBID for application in MRFM. info:eu-repo/grantAgreement/EUR/COST/CM1301 info:eu-repo/grantAgreement/ES/MINECO/MAT2014-51982-C2-1-R info:eu-repo/grantAgreement/ES/MINECO/MAT2014-51982-C2-2-R info:eu-repo/grantAgreement/ES/MINECO/MAT2015-69725-REDT info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 2.968 2017 PHYSICS, APPLIED 36 / 146 = 0.247 2017 Q1 T1 NANOSCIENCE & NANOTECHNOLOGY 45 / 92 = 0.489 2017 Q2 T2 MATERIALS SCIENCE, MULTIDISCIPLINARY 85 / 285 = 0.298 2017 Q2 T1 1.119 2017 Electrical and Electronic Engineering 2017 Q1 Physics and Astronomy (miscellaneous) 2017 Q1 Materials Science (miscellaneous) 2017 Q1 Nanoscience and Nanotechnology 2017 Q2 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion (orcid)0000-0002-6761-6171 Magén, C. Universidad de Zaragoza Mofakhami, D. de Loubens, G. (orcid)0000-0001-9566-0738 De Teresa, J.M. Universidad de Zaragoza 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 8, 1 (2017), 2106-2115 Beilstein j. nanotechnol. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2190-4286 656560 http://zaguan.unizar.es/record/69740/files/texto_completo.pdf Versión publicada 70370 http://zaguan.unizar.es/record/69740/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:69740 articulos driver 2019-07-09-12:06:15 ARTICLE