Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 23: [DS] Focused electron beam induced processing for the fabrication of nanostructures II (focused session, jointly with O – Organizers: Huth, Marbach)
O 23.3: Topical Talk
Dienstag, 27. März 2012, 10:30–11:00, H 0111
Tailored cobalt nanostructures by FEBID — •José M. de Teresa1,2, Rosa Córdoba2, Luis Serrano-Ramón1,2, Amalio Fernández-Pacheco1,2, and Ricardo Ibarra1,2 — 1Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, Spain — 2Laboratorio de Microscopías Avanzadas, Instituto de Nanociencia de Aragón, Universidad de Zaragoza, Spain
Focused-electron-beam-induced-deposition (FEBID) using Co2(CO)8 gas precursor allows the direct writing of cobalt-based magnetic structures [1]. We first grew high-purity cobalt structures with FEBID using high beam currents [2, 3]. The coercive field of these structures can be controlled via the shape anisotropy [4], and single-domain behavior can be observed [5]. Interestingly, the domain-wall propagation field can be lower than the domain-wall nucleation field, with potential magnetic applications [6]. The spin polarization of these cobalt deposits is large enough for its use in Spin Electronics [7]. We have recently achieved the growth of narrow high-cobalt-content nanowires (30 nm) and Hall sensors (100 nm), opening the route for the growth of cobalt structures tailored at the nanoscale [8].
[1] I. Utke et al., J. Vac. Sci. Technol. B 26 (2008) 1197 [2] A. Fernández-Pacheco et al, J.Phys. D: Appl. Phys. 42 (2009) 055005 [3] R. Córdoba et al., Nanoscale Res. Lett. 6 (2011) 592 [4] A. Fernández-Pacheco et al, Nanotechnology 20 (2009) 475704 [5] M. Jafaar et al., Nanoscale Res. Lett. 6 (2011) 407 [6] A. Fernández-Pacheco et al, Appl. Phys. Lett. 94 (2009) 192509 [7] S. Sangiao et al., Solid State Commun. 151 (2011) 37 [8] L. Serrano-Ramón et al., ACSnano 5 (2011) 7781