jap banner
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter iResearch App Facebook

Journal of Applied Physics / Volume 108 / Issue 2 / ARTICLES / Magnetism and Superconductivity

J. Appl. Phys. 108, 023902 (2010); http://dx.doi.org/10.1063/1.3462429 (4 pages)

Field-dependent ultrafast dynamics and mechanism of magnetization reversal across ferrimagnetic compensation points in GdFeCo amorphous alloy films

Zhifeng Chen, Ruixin Gao, Zixin Wang, Chudong Xu, Daxin Chen, and Tianshu Lai

State-Key Laboratory of Optoelectronic Materials and Technologies, School of Physics Science and Engineering, Sun Yat-Sen University, Guangzhou, Guangdong 510275, People’s Republic of China

View MapView Map

(Received 14 December 2009; accepted 10 June 2010; published online 16 July 2010)

Ultrafast dynamics of genuine magneto-optical recording across ferrimagnetic compensation points is demonstrated in GdFeCo films using time-resolved polar Kerr spectroscopy combined with a laser-synchronized sinusoidal alternating magnetic field which can reinitialize irreversible initial magnetization state to laser radiating. The external field dependence of magnetization reversal dynamics is measured and shows that reversal rate accelerates with increasing external fields. Analysis of the magnetization reversal dynamics with Bloch equation shows the magnetization reversal rate is linearly dependent on the external fields within experimental errors, which supports quantitatively that the mechanism of magneto-optical recording in rare earth-transition metal ferromagnetic films is related to the formation and growth of the reversed domains. It is also shown that nucleation field is obviously larger than hot coercivity shown in the anomalous hysteresis loop.

© 2010 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENT
  3. RESULTS AND ANALYSIS
  4. CONCLUSION

RELATED DATABASES

To view database links for this article, you need to log in.

KEYWORDS and PACS

Keywords

amorphous magnetic materials, cobalt alloys, coercive force, ferromagnetic materials, gadolinium alloys, iron alloys, Kerr magneto-optical effect, magnetic domains, magnetic thin films, magnetisation reversal, magneto-optical recording, nucleation, time resolved spectra

PACS

  • 85.70.Sq

    Magnetooptical devices

  • 75.60.Ej

    Magnetization curves, hysteresis, Barkhausen and related effects

  • 75.50.Ss

    Magnetic recording materials

  • 78.20.Ls

    Magneto-optical effects

  • 75.60.Jk

    Magnetization reversal mechanisms

  • 75.78.Jp

    Ultrafast magnetization dynamics and switching

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3462429

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.

    References

    H. F. Hamann, Y. C. Martin, and H. K. Wickramasinghe, Appl. Phys. Lett. 84, 810 (2004)APPLAB000084000005000810000001.

    J. Hohlfeld, T. Gerrits, M. Bilderbeek, T. Rasing, H. Awano, and N. Ohta, Phys. Rev. B 65, 012413 (2001).

    C. D. Stanciu, A. Tsukamoto, A. V. Kimel, F. Hansteen, A. Kirilyuk, A. Itoh, and T. Rasing, Phys. Rev. Lett. 99, 217204 (2007).

    T. Ogasawara, N. Iwata, Y. Murakami, H. Okamoto, and Y. Tokura, Appl. Phys. Lett. 94, 162507 (2009)APPLAB000094000016162507000001.

    K. Vahaplar, A. M. Kalashnikova, A. V. Kimel, D. Hinzke, U. Nowak, R. Chantrell, A. Tsukamoto, A. Itoh, A. Kirilyuk, and T. Rasing, Phys. Rev. Lett. 103, 117201 (2009).

    J. Hohlfeld, C. D. Stanciu, and A. Rebei, Appl. Phys. Lett. 94, 152504 (2009)APPLAB000094000015152504000001.

    M. Schultz and M. Kryder, Appl. Phys. Lett. 54, 1371 (1989)APPLAB000054000014001371000001.

    X. D. Liu, Z. Xu, R. X. Gao, Z. F. Chen, T. S. Lai, J. Du, and S. M. Zhou, J. Appl. Phys. 106, 053907 (2009)JAPIAU000106000005053907000001.

    X. D. Liu, Z. Xu, R. X. Gao, H. N. Hu, Z. F. Chen, Z. X. Wang, J. Du, S. M. Zhou, and T. S. Lai, Appl. Phys. Lett. 92, 232501 (2008)APPLAB000092000023232501000001.

    J. S. Suen, M. H. Lee, G. Teeter, and J. L. Erskine, Phys. Rev. B 59, 4249 (1999).

    C. Xu, Z. Chen, D. Chen, S. Zhou, and T. Lai, Appl. Phys. Lett. 96, 092514 (2010)APPLAB000096000009092514000001.

    N. D. Rizzo, T. J. Silva, and A. B. Kos, Phys. Rev. Lett. 83, 4876 (1999).

    M. Aeschlimann, A. Vaterlaus, M. Lutz, M. Stampanoni, and F. Meier, J. Appl. Phys. 67, 4438 (1990)JAPIAU000067000009004438000001.


For access to citing articles, you need to log in.


Figures (4)

Access to article objects (figures, tables, multimedia) requires a subscription; log in to view available files.
(Access to supplementary files, where available, is free for this journal.)



Close

Google Calendar

ADVERTISEMENT

Your Recent History Recent History Help

Recently Viewed

  1. Field-dependent ultrafast dynamics and mechanism of magnetization reversal across ferrimagnetic compensation points in GdFeCo amorphous alloy films
Go to AIP Home   © AIP Publishing LLC
close