Title

Magnetization Reversal through a Soliton in a Site-Dependent Weak Ferromagnet

DOI

10.6122/CJP.51.251

Authors

L. Kavitha;M. Saravanan;P. Sathishkumar;D. Gopi

Key Words
PublicationName

Chinese Journal of Physics

Volume or Term/Year and Month of Publication

51卷2期(2013 / 04 / 01)

Page #

251 - 278

Content Language

英文

English Abstract

Magnetization reversal or switching is the process by which the magnetization of a specimen is changed from one stable direction into another. Switching the magnetization of a magnetic bit through the flipping of a soliton offers the possibility of developing a new innovative approach for data storage technologies. The spin dynamics of a site-dependent ferromagnet with the antisymmetric Dzyaloshinskii-Moriya interaction is governed by a generalized inhomogeneous higher order nonlinear Schrödinger equation. We demonstrate the magnetization reversal through the flipping of a soliton in the ferromagnetic medium by solving numerically the two coupled evolution equations for the velocity and amplitude of the soliton using the fourth order Runge-Kutta method. We propose a new approach for inducing the flipping behaviour of a soliton in the presence of an inhomogeneity by tuning the parameter associated with the Dzyaloshinskii-Moriya interaction, which causes the soliton to move with constant velocity and amplitude along the spin lattice.

Topic Category 基礎與應用科學 > 物理
Reference
  1. A. Thiaville, Phys. Rev. B 61, 12221 (2000).
    連結:
  2. B. Hillebrands and J. Fassbender, Nature 418, 493 (2002).
    連結:
  3. I. Tudosa et al., Nature 428, 831 (2004).
    連結:
  4. M. Daniel and L. Kavitha, Phys. Rev. B 66 184433(1) (2002).
    連結:
  5. C. Ederer and C. J. Fennie, J. Phys. Condens. Matter 20, 434219 (2008).
    連結:
  6. M. Lakshmanan and M. Daniel, Physica A 107, 533 (1981).
    連結:
  7. H. J. Mikeska, J. Magn. Magn. Mater. 15-18, 1061 (1980).
    連結:
  8. V. Veerakumar and M. Daniel, Math. Comput. Simulat. 62, 163 (2003).
    連結:
  9. J. Dzyaloshinskii, J. Phys. Chem. Solids 4, 241 (1958).
    連結:
  10. T. Moriya, Phys. Rev. Lett. 4, 228 (1960).
    連結:
  11. A. S. T. Pires, J. Magn. Magn. Mater. 223, 304 (2001).
    連結:
  12. O. Derzhko, T. Krokhmalskii, and T. Verkholyak, J. Magn. Magn. Mater. 157, 421 (1996).
    連結:
  13. G. F. Zhang and Y. Zhou, Phys. Lett. A 370, 136 (2007).
    連結:
  14. M. Daniel and R. Amuda, Phys. Rev. B 53, R2930 (1996).
    連結:
  15. M. Daniel and L. Kavitha, Phys. Rev. B 63, 172302(1) (2001).
    連結:
  16. M. Lakshmanan and R. K. Bullough, Phys. Lett. A 80, 287 (1980).
    連結:
  17. L. Kavitha and M. Daniel, J. Phys. A: Math. Gen. 36, 10471 (2003).
    連結:
  18. T. Holstein and H. Primakoff, Phys. Rev. 58, 1098 (1940).
    連結:
  19. R. J. Glauber, Phys. Rev. 131, 2766 (1963).
    連結:
  20. Y. Kodama and M. J. Ablowitz, Stud. Appl. Math. 64, 225 (1981).
    連結:
  21. L. Kavitha, B. Srividya, and D. Gopi, Comput. Math. Appl. 62, 4691 (2011).
    連結:
  22. A. Hebert and R. Sch¨afer Magnetic Domains, (Springer-Velag, Berlin, 1998).
  23. Th. Gerrits, H. A. M. Van den Berg, J. Hohlfeld, L. B¨ar, and Th. Rasing, Nature 418, 509 (2002).
  24. R. W. Chantrell, M. Wongsam, J. D. Hannay, and O. Chubykalo, Comput. Mater. Sci. 17, 483 (2000).
  25. M. Bauer, J. Fassbender, B. Hillebrands, and R. L. Stamps, Phys. Rev. B 61, 3410 (2000).
  26. M. Daniel, L. Kavitha, and R. Amuda, Physica A 282, 155 (2000).
  27. L. Kavitha, P. Sathishkumar, and D. Gopi, Phys. Scr. 83, 055701 (2011).
  28. L. Yi, G. B¨uttner and K. D. Usadel, Phys. Rev. B 47, 254 (1993).
  29. R. Jafari, M. Kargarian, A. Langari, and M. Siahatgar, Phys. Rev. B 78, 214414 (2008).
  30. J. de Sousa, D. F. de Albuquerque, and I. P. Fittipaldi, Phys. Lett. A 191, 275 (1994).
  31. M. Daniel, K. Porsezian, and M. Lakshmanan, J. Math. Phys. 35, 6498 (1994).
  32. R. Myrzakulov, M. Daniel, and R. Amuda, Physica A 234, 715 (1997).
  33. L. Kavitha, P. Sathishkumar, and D. Gopi, Phys. Scr. 79, 015402 (2009).
  34. D. Wagner, Introduction to the Theory of Magnets, (Pergamon Press, Oxford, 1972).
  35. V. E. Zakharov and A. B. Shabat, Sov. Phys. JETP 34, 62 (1972).
  36. J. H. Mathews, Numerical Methods for Mathematics, Science and Engineering, (Prentice-Hall of India, New Delhi, 1998).
  37. D. I. Ketcheson, J. Comput. Phys. 229, 1763 (2010). [38] M. C. Lovell, A. J. Avery, and M. W. Vernon, Physical Properties
  38. M. C. Lovell, A. J. Avery, and M. W. Vernon, Physical Properties of Materials, (Van Nostrand Reinhold, UK, 1976).