Measurements of Local Coercivity Distribution in Ferromagnetic Films Using Magneto-Optical Microscope Magnetometer (MOMM)

  • Choe, Sug-Bong (Department of Physics and Center for Nanospinics of Spintronic Materials, Korea Advanced Institute of Science and Technology) ;
  • Shin, Sung-Chul (Department of Physics and Center for Nanospinics of Spintronic Materials, Korea Advanced Institute of Science and Technology)
  • Published : 2000.09.01

Abstract

A magneto-optical microscope magnetometer (MOMM) has been developed to simultaneously measure 2-dimensional array hysteresis loops of each local area of $320\times320-nm^2$ spots on ferromagnetic films, in addition to grabbing time-resolved domain evolution patterns. Using the system, spatial distribution of local coercivity can be quantitatively generated and then, compared directly with domain patterns grabbed at precisely the same position of a sample. It is clearly demonstrated that local coercivity distribution governs domain reversal behavior via a thermally activated relaxation process.

Keywords

References

  1. Phys. Rev. Lett v.81 T. Aign;P. Meyer;S. Lemerle;J. P. Jamet;J. Ferre;V. Mathet;C. Chappert;J. Gierak;C. Vieu;F. Rousseaux;H. Launios;H. Bernas
  2. IEEE Trans. Magn. v.17 S. Foner
  3. J. Appl. Phys v.69 G. A. Gibson;S. Schultz
  4. IEEE Trans. Magn. v.8 W. Webb
  5. Phys. Stat. Sol v.144 H. Kronmuller
  6. Science v.272 M. Hehn;K. Ounadjela;J. P. Bucher;F. Rousseaux;D. Decanini;B. Bartenlian;C. Chappert
  7. Rep. Prog. Phys. v.57 E. Bauer
  8. Rev. Sci. Instrum v.61 M. R. Scheinfein;J. Unguris;M. H. Kelly;D. T. Pierce;R. J. Celotta
  9. Phys. Rev v.B 57 S. B. Choe;S. C. Shin
  10. J. Appl. Phys v.69 S. C. Shin;J. H. Kim;D. H. Ahn
  11. Phys. Rev. Lett v.65 R. Wiesendanger;H. J. Guntherodt;G. Guntherodt;R. J. Gambino;R. Ruf
  12. Appl. Phys. Lett v.47 P. F. Carcia;A. D. Meinhaldt;A. Suna
  13. Hysteresis in Magnetism G. Bertotti
  14. Jpn. J. Appl. Phys v.32 K. Sato;H. Hongu;H. Ikekame;Y. Tosaka
  15. Phys. Today v.48 E. Dan Dahlberg;J. G. Zhu
  16. Science v.281 S. Gider;B. U. Runge;A. C. Marley;S. S. P. Parkin
  17. J. Appl. Phys v.67 D. G. Stinston;S. C. Shin
  18. J. Appl. Phys v.87 S. B. Choe;S. C. Shin
  19. Appl. Phys. Lett v.61 E. Betzig;J. K. Traman;R. Wolfe;E. M. Gyorgy;P. L. FInn;M. H. Kryder;C. H. Chang
  20. J. Appl. Phys v.87 S. B. Choe;S. C. Shin
  21. Appl. Phys. Lett v.70 S. B. Choe;S. C. Shin
  22. Appl. Surf. Sci v.65 S. C. Shin