C06 – Spin currents in magnetic nanostructures

Funding period: 2008 – 2011

Principal investigators: Mathias Kläui, Ulrich Rüdiger

Scientific staff: Olivier Boulle, Gregor Malinowski, Philipp Möhrke, Lutz Heyne, Jan Heinen, June Kim-Seo, Ajit Patra

The focus in this project lies on the generation and usage of pure spin currents to manipulate magnetization configurations. Using spin injection, spin pumping and the spin Hall effect, spin currents are created and will be employed to move domain walls in a non-local geometry. Direct high-resolution imaging of spin currents in metal structures will be used to probe the spatial distribution and the local polarization of spin currents with element sensitivity. In combination with different and even inhomogeneous materials this will be used to understand the physical origins of the spin Hall effect. The long-term goal of this project is to elucidate if pure spin currents can be employed in potential spintronic devices and, therefore, to make technical use of the ultra-low energy dissipation of such currents.

For further information please also refer to the group websites: AG Kläui, LS Rüdiger.

List of publications

2012

  • J. Heinen, D. Hinzke, O. Boulle, et al., Determination of the spin torque non-adiabaticity in perpendicularly magnetized nanowires, J. Cond. Matt. 24, 24220 (2012)

2011

  • O. Boulle, G. Malinowski, M. Klaeui, Current-induced domain wall motion in nanoscale ferromagnetic elements, Mater. Sci. Eng. R 72, no. 9 (2011)
    doi: 10.1016/j.mser.2011.04.001
  • J. Heinen, D. Hinzke, O. Boulle, G. Malinowski, H.J.M. Swagten et al., Extraction of the spin torque non-adiabaticity from thermally activated domain wall hopping, Appl. Phys. Lett. 99, 242501 (2011)
  • L. Heyne, M. Klaeui.  Analytical description for current-induced vortex core displacement, J. App. Physics 109, 3549651 (2011)
  • G. Malinowski, O. Boulle, M. Klaeui, Current-induced domain wall motion in nanoscale ferromagnetic elements,  J. Phys. D-App. Physics 44, 384005 (2011)
  • C. A. F. Vaz, J. Rhensius, J. Heidler, P. Wohlhüter, A. Bisig, H. S. Körner, T. O. Mentes, A. Locatelli, L. Le Guyader, F. Nolting, T. Graf, C. Felser, L. J. Heyderman, and M. Kläui, Spin configurations in Co2FeAl0.4Si0.6 Heusler alloy thin film elements, Appl. Phys. Lett. 99, 182510  (2011)

2010

  • A. Bisig, J. Rhensius, M. Kammerer, M. Curcic, H. Stoll, G. Schutz, B. Van Waeyenberge, et al., Direct imaging of current induced magnetic vortex gyration in an asymmetric potential well,  Appl. Phys. Lett. 96, 3373590 (2010)
  • M. Eltschka, M. Wötzel, J. Rhensius, S. Krzyk, U. Nowak, M. Kläui, T. Kasama, R. E. Dunin- Borkowski, L. J. Heyderman, H. J. van Driel, R. A. Duine, Nonadiabatic spin-Torque investigated using thermally activated magnetic domain wall dynamics, Phys. Rev. Lett. 105, 056601 (2010)
  • J. Heinen, O. Boulle, K. Rousseau, G. Malinowski, M. Kläui, H. J. M. Swagten, B. Koopmans, C. Ulysse, G. Faini, Current-induced domain wall motion in Co/Pt nanowires: Separating spin torque and Oersted-field effects, Appl. Phys. Lett. 96, 202510 (2010)
  • L. Heyne, M. Kläui, J. Rhensius, L. Le Guyader, F. Nolting, In situ contacting and current-injection into samples in photoemission electron microscopes, Rev. Sci. Instrum. 81, 113707 (2010)
  • L. Heyne, J. Rhensius, A. Bisig, S. Krzyk, P. Punke, M. Klaui, L. J. Heyderman, L. Le Guyader, and F. Nolting, Direct observation of high velocity current induced domain wall motion,  Appl. Phys. Lett. 96, 3291067 (2010)
  • L. Heyne, J. Rhensius, D. Ilgaz, et al., Direct determination of large spin-Torque nonadiabaticity in vortex core dynamics,  Phys. Rew. Lett. 105, 187203 (2010)
  • D. Ilgaz, J. Nievendick, L. Heyne, D. Backes, J. Rhensius, T. A. Moore, M. A. Nino, A. Locatelli, T. O. Mentes, A. von Schmidsfeld, A. von Bieren, S. Krzyk, L. J. Heyderman, M. Kläui, Domain-Wall Depinning Assisted by Pure Spin, Phys. Rev. Lett. 105, 076601 (2010)
  • J. S. Kim, O. Boulle, S. Verstoep, L. Heyne, J. Rhensius, M. Klaui, L. J. Heyderman, et al., Current-induced vortex dynamics and pinning potentials probed by homodyne detection, Phys. Review B 82, 104427 (2010)
  • S. Krzyk, A. Schmidsfeld, M. Kläui, U. Rüdiger, Magnetotransport effects of ultrathin Ni80Fe20 films probed in situ, New. J. Phys. 12, 013001 (2010)
  • G. Malinowski, A. Lorincz, S. Krzyk, P. Mohrke, D. Bedau, O. Boulle, J. Rhensius, et al., Current-induced domain wall motion in Ni80Fe20 nanowires with low depinning fields, J. Phys. D-App. Physics 43, 045003 (2010)
  • P. Möhrke, J. Rhensius, J. U. Thiele, L. J. Heyderman, M. Kläui, Tailoring laser-induced domain wall pinning, Solid State Commun. 150, 489 (2010)
  • T. A. Moore, P. Mohrke, et al., Magnetic-field-induced domain-wall motion in permalloy nanowires with modified Gilbert damping, Phys. Review B 82, 094445 (2010)
  • A. K. Patra, A. von Bieren, S. Krzyk, J. Rhensius, L. J Heyderman, R. Hoffmann, and M. Klaui, Magnetoresistance measurement of tailored Permalloy nanocontacts, Phys. Review B 82, 134447 (2010)
  • J. Rhensius, L. Heyne, D. Backes, S. Krzyk, L. J Heyderman, L. Joly, F. Nolting, and M. Klaui, Imaging of domain wall inertia in permalloy half-ring nanowires by time-resolved photoemission electron microscopy, Phys. Rev. Lett. 104, 067201 (2010)

2009

  • J. H. Franken, P. Möhrke, M. Kläui, J. Rhensius, L. J. Heyderman, J. U. Thiele, H. J. M. Swagten, U. J. Gibson, U. Rüdiger, Effects of combined current injection and laser irradiation on Permalloy microwire switching, Appl. Phys. Lett. 95, 212502 (2009)

2008

  • O. Boulle, J. Kimling, P. Warnicke, M. Kläui, U. Rüdiger, G. Malinowski, H. J. M. Swagten, B. Koopmans, C. Ulysse, G. Faini, Nonadiabatic spin transfer Torque in high anisotropy magnetic nanowires with narrow domain walls, Phys. Rev. Lett. 101, 216601 (2008)
  • D. Ilgaz, M. Klaui, L. Heyne, O. Boulle, F. Zinser, S. Krzyk, M. Fonin, U. Rudiger, D. Backes, and L. J Heyderman, Selective domain wall depinning by localized Oersted fields and Joule heating, Appl. Phys. Lett. 93, 2990629 (2008)
  • M. Kläui, Head-to-head domain walls in magnetic nanostructures, J. Phys.: Condens. Matter 20, 313001 (2008)
  • M. Klaui, Magnetic rings: A playground to study geometrically confined domain walls. Ed. B. Azzerboni, G. Asti, L. Pareti, and M. Ghidini. Magnetic Nanostructures in "Modern Technology: Spintronics, Magnetic MEMS and Recording", 85–104 (2008)