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Direct observation of individual Barkhausen avalanches in nucleation-mediated magnetization reversal processes

Appl. Phys. Lett. 95, 182504 (2009); doi:10.1063/1.3256188

Published 3 November 2009

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Mi-Young Im,1,3 Peter Fischer,1 Dong-Hyun Kim,2 and Sung-Chul Shin3
1Center for X-ray Optics, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
2Department of Physics, Chungbuk National University, Cheongju 361-763, Republic of Korea
3Department of Physics and Center for Nanospinics of Spintronic Materials, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
We report the scaling behavior of Barkhausen avalanches [H. Barkhausen, Z. Phys. 20, 401 (1919).] along the hysteresis loop of a CoCrPt alloy film with perpendicular magnetic anisotropy for every field step of 200 Oe. Individual Barkhausen avalanches are directly observed via soft x-ray microscopy with a spatial resolution of 15 nm. The Barkhausen avalanches exhibit a power-law scaling behavior, where the scaling exponent of the power-law distribution drastically changes from 1±0.04 to 1.47±0.03 as the applied field approaches the coercivity of the CoCrPt film. We infer that this is due to the coupling of adjacent domains. ©2009 American Institute of Physics
History: Received 6 April 2009; accepted 7 October 2009; published 3 November 2009
Permalink: http://link.aip.org/link/?APPLAB/95/182504/1
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KEYWORDS and PACS

Keywords
PACS
  • 75.60.Ej
    Magnetization curves, hysteresis, Barkhausen and related effects
  • 75.30.Gw
    Magnetic anisotropy
  • 75.60.Jk
    Magnetization reversal mechanisms
  • 75.70.Kw
    Domain structure in magnetic films (magnetic bubbles)
  • 68.55.jd
    Thin film thickness
  • 68.37.Yz
    X-ray microscopy of surfaces, interfaces and thin films
  • 75.70.Ak
    Magnetic properties of monolayers and thin films
  • YEAR: 2009

PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
Publisher:
AIP is a member of CrossRef AIP

REFERENCES (21)
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  1. H. Barkhausen, Z. Phys. 20, 401 (1919).
  2. J. S. Urbach, R. C. Madison, and J. T. Markert, Phys. Rev. Lett. 75, 276 (1995).
  3. J. P. Sethna, K. A. Dahmen, and C. R. Myers, Nature (London) 410, 242 (2001).
  4. S. Zapperi, P. Cizeau, G. Durin, and H. E. Stanley, Phys. Rev. B 58, 6353 (1998).
  5. K. -S. Ryu, H. Akinaga, and S. -C. Shin, Nat. Phys. 3, 547 (2007).
  6. D. -H. Kim, S. -B. Choe, and S. -C. Shin, Phys. Rev. Lett. 90, 087203 (2003).
  7. A. Sharoni, J. G. Ramirez, and I. K. Schuller, Phys. Rev. Lett. 101, 026404 (2008).
  8. S. Field, J. Witt, F. Nori, and X. Ling, Phys. Rev. Lett. 74, 1206 (1995).
  9. D. S. Fisher, Phys. Rev. Lett. 50, 1486 (1983).
  10. G. Durin and S. Zapperi, in The Science of Hysteresis, edited by G. Bertotti and I. Mayergoyz (Academic, New York, 2005), pp. 181–267.
  11. A. Berger, A. Inomata, J. S. Jiang, J. E. Pearson, and S. D. Bader, Phys. Rev. Lett. 85, 4176 (2000).
  12. F. Pazmandi, G. Zarand, and G. T. Zimanyi, Phys. Rev. Lett. 83, 1034 (1999).
  13. M. Mansuripur, The Physical Principles of Magneto-optical Recording (Cambridge University Press, New York, 1995), pp. 543–676.
  14. A. Hubert and R. Schaefer, Magnetic Domains (Springer, Berlin, 1998).
  15. A. Schwarz, M. Liebmann, U. Kaiser, R. Wiesendanger, T. W. Noh, and D. W. Kim, Phys. Rev. Lett. 92, 077206 (2004).
  16. P. Fischer, D. -H. Kim, B. L. Mesler, W. Chao, A. E. Sakdinawat, and E. H. Anderson, Surf. Sci. 601, 4680 (2007).
  17. Y. Xu, J. P. Wang, and Y. Su, J. Appl. Phys. 87, 6971 (2000).
  18. M. -Y. Im, P. Fischer, T. Eimüller, G. Denbeaux, and S. -C. Shin, Appl. Phys. Lett. 83, 4589 (2003).
  19. M. -Y. Im, D. -H. Kim, and S. -C. Shin, Phys. Rev. B 72, 132416 (2005).
  20. M. -Y. Im, P. Fischer, D. -H. Kim, K. -D. Lee, S. H. Lee, and S. -C. Shin, Adv. Mater. 20, 1750 (2008).
  21. T. J. Collins, BioTechniques 43, 25 (2007).

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