Optimization of nanostructured permalloy electrodes for a lateral hybrid spin-valve structure

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dc.creatorLast, T.
dc.creatorHacia, S.
dc.creatorWahle, M.
dc.creatorFischer, S. F.
dc.creatorKunze, U.
dc.date2003-12-18
dc.date2004-06-18
dc.date.accessioned2026-07-07T02:55:28Z
dc.date.available2026-07-07T02:55:28Z
dc.descriptionFerromagnetic electrodes of a lateral semiconductor-based spin-valve structure are designed to provide a maximum of spin-polarized injection current. A single-domain state in remanence is a prerequisite obtained by nanostructuring Permalloy thin film electrodes. Three regimes of aspect ratios $m$ are identified by room temperature magnetic force microscopy: (i) high-aspect ratios of $m \ge 20$ provide the favored remanent single-domain magnetization states, (ii) medium-aspect ratios $m \sim 3$ to $m \sim 20$ yield highly remanent states with closure domains and (iii) low-aspect ratios of $m \le 3$ lead to multi-domain structures. Lateral kinks, introduced to bridge the gap between micro- and macroscale, disturb the uniform magnetization of electrodes with high- and medium-aspect ratios. However, vertical flanks help to maintain a uniformly magnetized state at the ferromagnet-semiconcuctor contact by domain wall pinning.
dc.descriptionrevised version, major structural changes, figures reorganized,6 pages, 8 figures, revtex
dc.identifierhttps://arxiv.org/abs/cond-mat/0312466
dc.identifierhttp://arxiv.org/abs/cond-mat/0312466
dc.identifierJ. Appl. Phys. 96 (11), 6706-6711 (2004).
dc.identifierdoi:10.1063/1.1810197
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/22952
dc.subjectOther Condensed Matter
dc.titleOptimization of nanostructured permalloy electrodes for a lateral hybrid spin-valve structure
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