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Proceedings Paper

New insights into nanomagnetism: spin-polarized scanning tunneling microscopy and spectroscopy studies
Author(s): Hirofumi Oka; Guillemin Rodary; Sebastian Wedekind; Pavel A. Ignatiev; Larissa Niebergall; Valeri S. Stepanyuk; Dirk Sander; Jürgen Kirschner
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Paper Abstract

We perform low-temperature spin-polarized scanning tunneling microscopy (SP-STM) and spectroscopy measurements in magnetic fields to gain new insights into nanomagnetism. We use the magnetic field to change and control magnetizations of a sample and a magnetic tip, and measure the magnetic hysteresis loops of individual Co nano-islands on Cu(111). We also exploit the high spatial resolution of SP-STM in magnetic fields to measure maps of the differential conductance within a single Co nano-island. In connection with ab initio calculations, we find that the spin polarization is not homogeneous but spatially modulated within the nano-island. We ascribe the spatial variation of the spin polarization to spin-dependent electron confinement within the Co nano-island.

Paper Details

Date Published: 15 September 2011
PDF: 9 pages
Proc. SPIE 8100, Spintronics IV, 81000O (15 September 2011); doi: 10.1117/12.892459
Show Author Affiliations
Hirofumi Oka, Max-Planck-Institut für Mikrostrukturphysik (Germany)
Guillemin Rodary, Max-Planck-Institut für Mikrostrukturphysik (Germany)
Sebastian Wedekind, Max-Planck-Institut für Mikrostrukturphysik (Germany)
Pavel A. Ignatiev, Max-Planck-Institut für Mikrostrukturphysik (Germany)
Larissa Niebergall, Max-Planck-Institut für Mikrostrukturphysik (Germany)
Valeri S. Stepanyuk, Max-Planck-Institut für Mikrostrukturphysik (Germany)
Dirk Sander, Max-Planck-Institut für Mikrostrukturphysik (Germany)
Jürgen Kirschner, Max-Planck-Institut für Mikrostrukturphysik (Germany)


Published in SPIE Proceedings Vol. 8100:
Spintronics IV
Henri-Jean M. Drouhin; Jean-Eric Wegrowe; Manijeh Razeghi, Editor(s)

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