Current-induced skyrmion dynamics in constricted geometries

Nature Nanotechnology

Volumn 8, Issue 10, 2013, Pages 742-747

  Iwasaki, Junichi ^a   Mochizuki, Masahito ^b   Nagaosa, Naoto ^a,c  

^a UNIVERSITY OF TOKYO   (Japan)

^b AOYAMA GAKUIN UNIVERSITY   (Japan)

^c RIKEN Center for Emergent Matter Science   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

DOMAIN WALLS; MAGNETS; SPINTRONICS;

CONFINED GEOMETRIES; INFORMATION CARRIERS; MICROMAGNETIC SIMULATIONS; SKYRMION DYNAMICS; SPINTRONIC DEVICE; STEADY STATE CHARACTERISTICS; TOPOLOGICAL NUMBER; TRANSVERSE CONFINEMENT;

GEOMETRY;

ARTICLE; DENSITY; DYNAMICS; ELECTRIC CURRENT; GEOMETRY; MAGNET; MAGNETIC FIELD; MOTION; PRIORITY JOURNAL; SIMULATION; STEADY STATE; VELOCITY;

EID: 84885472250     PISSN: 17483387     EISSN: 17483395     Source Type: Journal    
DOI: 10.1038/nnano.2013.176     Document Type: Article

References (25)

1. Skyrme, T. H. R. A unified field theory of mesons and baryons. Nucl. Phys. 31, 556-569 (1962)
2. Mu?hlbauer, S. et al. Skyrmion lattice in a chiral magnet. Science 323, 915-919 (2009)
3. Mu?nzer, W. et al. Skyrmion lattice in the doped semiconductor Fe12xCox Si. Phys. Rev. B 81, 041203(R) (2010)
4. Seki, S., Yu, X. Z., Ishiwata, S. & Tokura, Y. Observation of skyrmions in a multiferroic material. Science 336, 198-201 (2012)
5. Yu, X. Z. et al. Real-space observation of a two-dimensional skyrmion crystal. Nature 465, 901-904 (2010)
6. Yu, X. Z. et al. Near roomerature formation of a skyrmion crystal in thinfilms of the helimagnet FeGe. Nature Mater. 10, 106-109 (2011)
7. Malozemoff, A. P. & Slonczewski, J. C. in Magnetic Domain Walls in Bubble Materials (Academic, 1979)
8. Jonietz, F. et al. Spin transfer torques in MnSi at ultralow current densities. Science 330, 1648-1651 (2010)
9. Yu, X. Z. et al. Skyrmion flow near room temperature in an ultralow current density. Nature Commun. 3, 988 (2012)
10. Iwasaki, J., Mochizuki, M. & Nagaosa, N. Universal current-velocity relation of skyrmion motion in chiral magnets. Nature Commun. 4, 1463 (2013)
11. Tchoe, Y. & Han, J. H. Skyrmion generation by current. Phys. Rev. B 85, 174416 (2012)
12. Finazzi, M. et al. Laser-induced magnetic nanostructures with tunable topological properties. Phys. Rev. Lett. 110, 177205 (2013)
13. Yu, X. Z. et al. Magnetic stripes and skyrmions with helicity reversals. Proc. Natl Acad. Sci. USA 109, 8856-8860 (2012)
14. Everschor, K. et al. Rotating skyrmion lattices by spin torques and field or temperature gradients. Phys. Rev. B 86, 054432 (2012)
15. Schulz, T. et al. Emergent electrodynamics of skyrmions in a chiral magnet. Nature Phys. 8, 301-304 (2012)
16. Kla?ui, M. et al. Direct observation of domain-wall pinning at nanoscale constrictions. Appl. Phys. Lett. 87, 102509 (2005)
17. Martinez, E. et al. Thermal effects on domain wall depinning from a single notch. Phys. Rev. Lett. 98, 267202 (2007)
18. Jang, Y. et al. Current-induced domain wall nucleation and its pinning characteristics at a notch in a spin-valve nanowire. Nanotechnology 20, 125401 (2009)
19. Fert, A., Cros, V. & Sampaio, J. Skyrmions on the track. Nature Nanotech. 8, 152-156 (2013)
20. Shibata, J. et al. Current-induced magnetic vortex motion by spin-transfer torque. Phys. Rev. B 73, 020403 (2006)
21. Guslienko, K. et al. Magnetic vortex core dynamics in cylindrical ferromagnetic dots. Phys. Rev. Lett. 96, 067205 (2006)
22. Liu, Y. et al. Current-induced magnetic vortex core switching in a permalloy nanodisk. Appl. Phys. Lett. 91, 112501 (2007)
23. Wysin, G. Magnetic vortex mass in two-dimensional easy-plane magnets. Phys. Rev. B 54, 15156-15162 (1996)
24. Yamada, K. et al. Electrical switching of the vortex core in a magnetic disk. Nature Mater. 6, 269-273 (2007)
25. Zienkiewicz, O. C., Taylor, R. L. & Zhu, J. Z. in The Finite Element Method: Its Basis and Fundamentals (Elsevier Butterworth-Heinemann, 2005)