Dynamic switching of the spin circulation in tapered magnetic nanodisks

Nature Nanotechnology

Volumn 8, Issue 5, 2013, Pages 341-346

  Uhlir V ^a,b   Urbanek M ^b   Hladik L ^b   Spousta, J ^b   Im, M Y ^c   Fischer, P ^c   Eibagi, N ^a   Kan, J J ^a   Fullerton, E E ^a   Sikola T ^b  

^a UNIVERSITY OF CALIFORNIA   (United States)

^b BRNO UNIVERSITY OF TECHNOLOGY   (Czech Republic)

^c LAWRENCE BERKELEY NATIONAL LABORATORY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

MAGNETIC POLARITY; MAGNETIZATION; PROCESS CONTROL; X RAYS;

CONTROLLED DYNAMICS; DYNAMIC SWITCHING; IN-PLANE MAGNETIZATION; MAGNETIC VORTICES; MAGNETIZATION CONFIGURATION; PULSED MAGNETIC FIELDS; REVERSAL PROCESS; SOFT X-RAY TRANSMISSION MICROSCOPY;

VORTEX FLOW;

ARTICLE; DYNAMICS; IMAGING; MAGNETIC FIELD; MAGNETIC NANODISK; NANODEVICE; PRIORITY JOURNAL; SIMULATION; SPIN CIRCULATION; VORTEX MOTION;

EID: 84877251478     PISSN: 17483387     EISSN: 17483395     Source Type: Journal    
DOI: 10.1038/nnano.2013.66     Document Type: Article

References (53)

1. Hubert, A. & Schäfer, R. Magnetic Domains: The Analysis of Magnetic Nanostructures (Springer, 1998).
2. Shinjo, T., Okuno, T., Hassdorf, R., Shigeto, K. & Ono, T. Magnetic vortex core observation in circular dots of permalloy. Science 289, 930-932 (2000). (Pubitemid 30659941)
3. Wachowiak, A. et al. Direct observation of internal spin structure of magnetic vortex cores. Science 298, 577-580 (2002). (Pubitemid 35215307)
4. Choe, S-B. et al. Vortex core-driven magnetization dynamics. Science 304, 420-422 (2004). (Pubitemid 38495934)
5. Guslienko, K. Y. et al. Eigenfrequencies of vortex state excitations in magnetic submicron-size disks. J. Appl. Phys. 91, 8037-8039 (2002).
6. Novosad, V. et al. Spin excitations of magnetic vortices in ferromagnetic nanodots. Phys. Rev. B 66, 052407 (2002).
7. Park, J. P. & Crowell, P. A. Interactions of spin waves with a magnetic vortex. Phys. Rev. Lett. 95, 167201 (2005).
8. Buchanan, K. S., Grimsditch, M., Fradin, F. Y., Bader, S. D. & Novosad, V. Driven dynamic mode splitting of the magnetic vortex translational resonance. Phys. Rev. Lett. 99, 267201 (2007).
9. Antos, R. & Otani, Y. Simulations of the dynamic switching of vortex chirality in magnetic nanodisks by a uniform field pulse. Phys Rev. B 80, 140404(R) (2009).
10. Ishida, T., Kimura, T. & Otani, Y. Current-induced vortex displacement and annihilation in a single permalloy disk. Phys. Rev. B 74, 014424 (2006).
11. Pribiag, V. S. et al. Magnetic vortex oscillator driven by d.c. spin-polarized current. Nature Phys. 3, 498-503 (2007).
12. Ruotolo, A. et al. Phase-locking of magnetic vortices mediated by antivortices. Nature Nanotech. 4, 528-532 (2009).
13. Kosevich, A. M., Ivanov, B. A. & Kovalev, A. S. Magnetic solitons. Phys. Rep. 194, 117-238 (1990).
14. Van Waeyenberge, B. et al. Magnetic vortex core reversal by excitation with short bursts of an alternating field. Nature 444, 461-464 (2006). (Pubitemid 44809059)
15. Lee, K-S. & Kim, S-K. Two circular-rotational eigenmodes and their giant resonance asymmetry in vortex gyrotropic motions in soft magnetic nanodots. Phys Rev. B 78, 014405 (2008).
16. Yamada, K. et al. Electrical switching of the vortex core in a magnetic disk. Nature Mater. 6, 269-273 (2007).
17. Bohlens, S. et al. Current controlled random-access memory based on magnetic vortex handedness. Appl. Phys. Lett. 93, 142508 (2008).
18. Nakano, K. et al. All-electrical operation of magnetic vortex core memory cell. Appl. Phys. Lett. 99, 262505 (2011).
19. Goto, M. et al. Electric spectroscopy of vortex states and dynamics in magnetic disks. Phys. Rev. B 84, 064406 (2011).
20. Kikuchi, N. et al. Vertical bistable switching of spin vortex in a circular magnetic dot. J. Appl. Phys. 90, 6548-6549 (2001).
21. Hertel, R., Gliga, S., Fähnle, M. & Schneider, C. M. Ultrafast nanomagnetic toggle switching of vortex cores. Phys. Rev. Lett. 98, 117201 (2007).
22. Curcic, M. et al. Polarization selective magnetic vortex dynamics and core reversal in rotating magnetic fields. Phys. Rev. Lett. 101, 197204 (2007).
23. Guslienko, K. Y., Lee, K.-S. & Kim, S.-K. Dynamic origin of vortex core switching in soft magnetic nanodots. Phys. Rev. Lett. 100, 027203 (2008).
24. Lee K-S. et al. Universal criterion and phase diagram for switching a magnetic vortex core in soft magnetic nanodots. Phys. Rev. Lett. 101, 267206 (2008).
25. Kammerer, M. et al. Magnetic vortex core reversal by excitation of spin waves. Nature Commun. 2, 279 (2011).
26. Xiao, Q. F., Rudge, J., Choi, B. C., Hong, Y. K. & Donohoe, G. Dynamics of vortex core switching in ferromagnetic nanodisks. Appl. Phys. Lett. 89, 262507 (2006).
27. Nakano, K. et al. Real-time observation of electrical vortex core switching. Appl. Phys. Lett. 102, 072405 (2013).
28. Guslienko, K. Y., Novosad, V., Otani, Y., Shima, H. & Fukamichi, K. Field evolution of magnetic vortex state in ferromagnetic disks. Appl. Phys. Lett. 78, 3848-3850 (2001). (Pubitemid 33639055)
29. Schneider, M., Hoffmann, H. & Zweck, J. Magnetic switching of single vortex permalloy elements. Appl. Phys. Lett. 79, 3113-3115 (2001). (Pubitemid 33627460)
30. Yakata, S., Miyata, M., Nonoguchi, S., Wada, H. & Kimura, T. Control of vortex chirality in regular polygonal nanomagnets using in-plane magnetic field. Appl. Phys. Lett. 97, 222503 (2010).
31. Jaafar, M. et al. Control of the chirality and polarity of magnetic vortices in triangular nanodots. Phys. Rev. B 81, 054439 (2010).
32. Mironov, V. L. et al. MFM probe control of magnetic vortex chirality in elliptical Co nanoparticles. J. Magn. Magn. Mater. 312, 153-157 (2007).
33. Gaididei, Y., Sheka, D. D. & Mertens, F. G. Controllable switching of vortex chirality in magnetic nanodisks by a field pulse. Appl. Phys. Lett. 92, 012503 (2008).
34. Konoto, M. et al. Formation and control of magnetic vortex chirality in patterned micromagnet arrays. J. Appl. Phys. 103, 023904 (2008).
35. Yakata, S. et al. Chirality control of magnetic vortex in a square Py dot using current-induced Oersted field. Appl. Phys. Lett. 99, 242507 (2011).
36. Tanase, M. et al. Magnetization reversal in circularly exchange-biased ferromagnetic disks. Phys. Rev. B 79, 014436 (2009).
37. Im, M-Y. et al. Symmetry breaking in the formation of magnetic vortex states in a permalloy nanodisk. Nature Commun. 3, 983 (2012).
38. Choi, B. C. et al. Spin-current pulse induced switching of vortex chirality in permalloy/Cu/Co nanopillars. Appl. Phys. Lett. 91, 022501 (2007).
39. Stoner, E. C. & Wohlfarth, E. P. A mechanism of magnetic hysteresis in heterogeneous alloys. Phil. Trans. R. Soc. Lond. A 240, 599-642 (1948).
40. He, L., Doyle, W. D. & Fujiwara, H. High speed coherent switching below the Stoner-Wohlfarth limit. IEEE Trans. Magn. 30, 4086-4088 (1994).
41. Fischer, P. et al. Soft X-ray microscopy of nanomagnetism. Mater. Today 9, 26-33 (January-February, 2006). (Pubitemid 43008348)
42. Cowburn, R. P., Adeyeye, A. O. & Welland, M. E. Controlling magnetic ordering in coupled nanomagnet arrays. New J. Phys. 1, 16 (1999).
43. Natali, M. et al. Correlated magnetic vortex chains in mesoscopic cobalt dot arrays. Phys. Rev. Lett. 88, 157203 (2002).
44. Novosad, V. et al. Nucleation and annihilation of magnetic vortices in submicron permalloy dots. IEEE Trans. Magn. 37, 2088-2090 (2001). (Pubitemid 32969230)
45. Donahue, M. J. & Porter, D. G. OOMMF User's Guide, Version 1.0, Interagency Report NISTIR 6376 (National Institute of Standards and Technology, 1999).
46. Cheng, X. M., Buchanan, K. S., Divan, R., Guslienko, K. Y. & Keavney D. J. Nonlinear vortex dynamics and transient domains in ferromagnetic disks. Phys. Rev. B 79, 172411 (2009).
47. Park, J. P., Eames, P., Engebretson, D. M., Berezovsky, J. & Crowell, P. A. Imaging of spin dynamics in closure domain and vortex structures. Phys. Rev. B 67, 020403(R) (2003).
48. Döring, W. On the inertia of walls between Weiss domains. Z. Naturforsch. 3a, 373-379 (1948).
49. Dussaux, A. et al. Field dependence of spin-transfer-induced vortex dynamics in the nonlinear regime. Phys. Rev. B 86, 014402 (2012).
50. Chung, S-H., McMichael, R. D., Pierce, D. T. & Unguris, J. Phase diagram of magnetic nanodisks measured by scanning electron microscopy with polarization analysis. Phys. Rev. B 81, 024410 (2010).
51. Chang, R., Li, S., Lubarda, M. V., Livshitz, B. & Lomakin, V. FastMag: fast micromagnetic simulator for complex magnetic structures. J. Appl. Phys. 109, 07D358 (2011).
52. Escobar, M. A. et al. Advanced micromagnetic analysis of write head dynamics using FastMag. IEEE Trans. Magn. 48, 1731-1737 (2012).
53. Kasai, S. et al. Probing the spin polarization of current by soft X-ray imaging of current-induced magnetic vortex dynamics. Phys. Rev. Lett. 101, 237203 (2008).