Spin Waves pp 309-332 | Cite as

Novel Applications

  • Daniel D Stancil
  • Anil Prabhakar

Gedanken (or thought) experiments are often followed by practical demonstrations of underlying physics. Once laboratory experiments establish the physics, we could witness the emergence of a new technology. In parallel, as existing technologies mature, there is a rebirth of established ideas with the possibility of new applications. This chapter attempts to describe a few areas of current research in spin-waves, where the fate of novel physics and emerging technology are closely intertwined. For example, the advent of submicron lithographic techniques has given rise to nano-contact spin-wave generation structures using current-driven spin-transfer torques. Also, an improved understanding of spin-wave excitations helps describe noise in patterned nano-structures, and new techniques such as the Magneto-Optic Kerr Effect (MOKE) make it possible to probe the modes of patterned structures. Finally, the properties of backward spin-waves make it possible to observe the long-predicted inverse Doppler effect. Since these are all “hot topics,” we cannot do full justice to them or cover all the frontier areas of research. However, in this chapter, we shall attempt to provide self-contained descriptions of a few topics while referring the reader to recently published literature for a more complete account of the theoretical and technological nuances.


Doppler Shift Spin Wave Volume Wave Spin Current Microstrip Antenna 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    J. C. Slonczewski, ‘Current-driven excitation of magnetic multilayers,’ J. Magn. Magn. Matl., vol. 159, p. L1, 1996.CrossRefGoogle Scholar
  2. [2]
    L. Berger, ‘Emission of spin-waves by a magnetic multilayer traversed by a current,’ Phys. Rev. B, vol. 54, p. 9353, 1996.CrossRefGoogle Scholar
  3. [3]
    M. B. Stearns, ‘Simple explanation of tunneling spin-polarization of Fe, Co, Ni and its alloys,’ J. Magn. Magn. Matl., vol. 5, pp. 167–171, 1977.CrossRefGoogle Scholar
  4. [4]
    W. H. Butler, O. Heinonen, and X.-G. Zhang, The Physics of Ultra-High-Density Magnetic Recording. Berlin: Springer-Verlag, 2001, ch. 10.Google Scholar
  5. [5]
    N. Spaldin, Magnetic Materials – Fundamentals and Device Applications. Cambridge: Cambridge University Press, 2003, ch. 6.Google Scholar
  6. [6]
    H. Imamura and S. Maekawa, ‘Theory of spin-dependent tunneling,’ in Handbook of Magnetism and Advanced Magnetic Materials: Fundamentals and Theory, H. Krommüller and S. Parkin, Eds. New York, NY: John Wiley & Sons, 2007.Google Scholar
  7. [7]
    E. Merzbacher, Quantum Mechanics, 3rd ed. New York, NY: John Wiley & Sons, 1998.Google Scholar
  8. [8]
    K. Mita, ‘Virtual probability current associated with the spin,’ Am. J. Phys., vol. 68, p. 259, 2000.CrossRefGoogle Scholar
  9. [9]
    M. Stiles and A. Zangwill, ‘Anatomy of spin-transfer torque,’ Phys. Rev. B, vol. 66, p. 014407, 2002.CrossRefGoogle Scholar
  10. [10]
    S. M. Rezende, F. M. de Aguiar, and A. Azevedo, ‘Spin-wave theory for the dynamics induced by direct currents in magnetic multilayers,’ Phys. Rev. Lett., vol. 94, p. 037202, 2005.CrossRefGoogle Scholar
  11. [11]
    M. Tsoi, A. G. M. Jansen, J. Bass1, W.-C. Chiang, M. Seck1, V. Tsoi, and P. Wyder, ‘Excitation of a magnetic multilayer by an electric current,’ Phys. Rev. Lett., vol. 80, pp. 4281–4284, 1998.Google Scholar
  12. [12]
    J. C. Slonczewski, ‘Excitation of spin-waves by an electric current,’ J. Magn. Magn. Matl,, vol. 195, p. L261, 1999.CrossRefGoogle Scholar
  13. [13]
    J. Z. Sun, ‘Spin angular momentum transfer in current-perpendicular nanomagnetic junctions,’ IBM J. Res. Dev., vol. 50, pp. 81–100, 2006.CrossRefGoogle Scholar
  14. [14]
    I. N. Krivorotov, N. C. Emley, J. C. Sankey, S. I. Kiselev, D. C. Ralph, and R. A. Buhrman, ‘Time-domain measurements of nanomagnet dynamics driven by spin-transfer torquess,’ Science, vol. 307, p. 228, 2005.CrossRefGoogle Scholar
  15. [15]
    S. M. Rezende, F. M. de Aguiar, R. L. Rodriguez-Suarez, and A. Azevedo, ‘Mode locking of spin-waves excited by direct currents in microwave nano-oscillators,’ Phys. Rev. Lett., vol. 98, no. 8, p. 087202, 2007.Google Scholar
  16. [16]
    M. V. Costache, S. M. Watts, M. Sladkov, C. H. van der Wal, and B. J. van Wees, ‘Large cone angle magnetization precession of an individual nanopatterned ferromagnet with dc electrical detection,’ Appl. Phys. Lett., vol. 89, p. 232115, 2006.Google Scholar
  17. [17]
    L. Berger, ‘Generation of dc voltages by a magnetic multilayer undergoing ferromagnetic resonance,’ Phys. Rev. B, vol. 59, p. 11465, 1999.CrossRefGoogle Scholar
  18. [18]
    H. N. Bertram, V. L. Safonov, and Z. Jin, ‘Thermal magnetization noise, damping fundamentals, and mode analysis: Application to a thin film GMR sensor,’ IEEE Trans. Mag., vol. 38, pp. 2514–2519, 2002.CrossRefGoogle Scholar
  19. [19]
    F. Reif, Fundamentals of Statistical and Thermal Physics. New york McGraw Hill Intl. Ed., 1985.Google Scholar
  20. [20]
    A. Barman, V. V. Kruglyak, R. J. Hicken, A. Kundrotaite, and M. Rahman, ‘Anisotropy, damping, and coherence of magnetization dynamics in a 10 μm square ni81fe19 element,’ Appl. Phys. Lett., vol. 82, pp. 3065–3067, 2003.CrossRefGoogle Scholar
  21. [21]
    J. D. Jackson, Classical Electrodynamics, 3rd ed. Singapore: John Wiley and Sons, 1999.MATHGoogle Scholar
  22. [22]
    V. G. Veslago, ‘The electrodynamics of substances with simultaneously negative values of ε and μ,’ Sov. Phys. Usp., vol. 10, p. 509, 1968.CrossRefGoogle Scholar
  23. [23]
    N. L. Koros, D. D. Stancil, and N. Bilaniuk, ‘Linear motion sensor using the Doppler effect with magnetostatic waves,’ J. Appl. Phys., vol. 67, p. 511, 1990.CrossRefGoogle Scholar
  24. [24]
    D. D. Stancil, B. E. Henty, A. G. Cepni, and J. P. V. Hof, ‘Observation of an inverse Doppler shift from left-handed dipolar spin-waves,’ Phys. Rev. B (Condensed Matter and Materials Physics), vol. 74, no. 6, p. 060404, 2006.Google Scholar

Copyright information

© Springer-Verlag US 2009

Authors and Affiliations

  1. 1.Carnegie Mellon UniversityPittsburghUSA
  2. 2.Indian Institute of TechnologyChennaiIndia

Personalised recommendations