Display options
Cite
Heyne L, Rhensius J, Ilgaz D, et al. Direct determination of large spin-torque nonadiabaticity in vortex core dynamics. Phys Rev Lett. 2010;105(18):187203doi: 10.1103/PhysRevLett.105.187203.
Heyne, L., Rhensius, J., Ilgaz, D., Bisig, A., Rüdiger, U., Kläui, M., Joly, L., Nolting, F., Heyderman, L. J., Thiele, J. U., & Kronast, F. (2010). Direct determination of large spin-torque nonadiabaticity in vortex core dynamics. Physical review letters, 105(18), 187203. https://doi.org/10.1103/PhysRevLett.105.187203
Heyne, L, et al. "Direct determination of large spin-torque nonadiabaticity in vortex core dynamics." Physical review letters vol. 105,18 (2010): 187203. doi: https://doi.org/10.1103/PhysRevLett.105.187203
Heyne L, Rhensius J, Ilgaz D, Bisig A, Rüdiger U, Kläui M, Joly L, Nolting F, Heyderman LJ, Thiele JU, Kronast F. Direct determination of large spin-torque nonadiabaticity in vortex core dynamics. Phys Rev Lett. 2010 Oct 29;105(18):187203. doi: 10.1103/PhysRevLett.105.187203. Epub 2010 Oct 25. PMID: 21231132.
Copy Download .nbib Format: NLM
Share it on

Phys Rev Lett. 2010 Oct 29;105(18):187203. doi: 10.1103/PhysRevLett.105.187203. Epub 2010 Oct 25.

Direct determination of large spin-torque nonadiabaticity in vortex core dynamics.

Physical review letters

L Heyne, J Rhensius, D Ilgaz, A Bisig, U Rüdiger, M Kläui, L Joly, F Nolting, L J Heyderman, J U Thiele, F Kronast

Affiliations

  1. Fachbereich Physik, Universität Konstanz, Universitätsstrasse 10, D-78457 Konstanz, Germany.

PMID: 21231132 DOI: 10.1103/PhysRevLett.105.187203

Abstract

We use a pump-probe photoemission electron microscopy technique to image the displacement of vortex cores in Permalloy discs due to the spin-torque effect during current pulse injection. Exploiting the distinctly different symmetries of the spin torques and the Oersted-field torque with respect to the vortex spin structure we determine the torques unambiguously, and we quantify the amplitude of the strongly debated nonadiabatic spin torque. The nonadiabaticity parameter is found to be β=0.15±0.07, which is more than an order of magnitude larger than the damping constant α, pointing to strong nonadiabatic transport across the high magnetization gradient vortex spin structures.

Publication Types