Comparative Study of Magnetization Reversal Process Between Elliptical and Rectangular CoFe Nanomagnets

  • N. V. S. S. Seshagiri Rao
  • V. Satya Narayana Murthy
Technical Paper
  • 57 Downloads

Abstract

The magnetization reversal process for elliptical and rectangular permendur (CoFe) nanostructures were compared using micromagnetic simulations. Single domain states were observed in 10 nm thick elliptical and rectangular nanomagnets. The magnetization reversal along the major and minor axis in 60 nm thick elliptical nanomagnets occurred through the formation of double vortex states. In rectangular nanomagnets, it occurred through the formation of single vortex state along 225 nm and double vortex state along 335 nm.

Keywords

Nanomagnets Magnetization reversal Demagnetizing fields Shape anisotropy Micromagnetic simulations 

Notes

Acknowledgements

One of the author N. V. S. S. Seshagiri Rao acknowledges BITS Pilani, Hyderabad Campus for financial support to carry out the above work.

References

  1. 1.
    B. D. Terris, T. Thomson, J. Phys. D: Appl. Phys. 38 (2005) R199.CrossRefGoogle Scholar
  2. 2.
    J. G. Zhu, Y. F. Zheng, G. A. Prinz, J. Appl. Phys. 87 (2000) 6668.CrossRefGoogle Scholar
  3. 3.
    J. Akerman, Science 308 (2005) 508.CrossRefGoogle Scholar
  4. 4.
    D. A. Allwood, G. Xiong, C. C. Faulkner, D. Atkinson, D. Petit, R. P. Cowburn, Science 309 (2005) 1688.CrossRefGoogle Scholar
  5. 5.
    N. M. Vargas, S. Allende, B. Leighton, J. Escrig, J. Mejía-López, D. Altbir, I. K. Schuller, J. Appl. Phys. 109 (2011) 073907.CrossRefGoogle Scholar
  6. 6.
    M. Hosomi, H. Yamagishi, T. Yamamoto, K. Bessho, Y. Higo, K. Yamane, H. Yamada, M. Shoji, H. Hachino, C. Fukumoto, Electron Devices Meeting, 2005. IEDM Technical Digest. IEEE International p. 459 (2005).Google Scholar
  7. 7.
    S. S. P. Parkin, M. Hayashi, and L. Thomas, Science 320, 190 (2008).CrossRefGoogle Scholar
  8. 8.
    S. Jeong, Y. N. Hsu, D. E. Laughlin, M. E. McHenry, IEEE Trans. Magn. 36 (2002) 2336.CrossRefGoogle Scholar
  9. 9.
    F. Carace, P. Vavassori, G. Gubbiotti, S. Tacchi, M. Madami, G. Carlotti, T. Okuno, Thin solid Films 515 (2006) 727–730.CrossRefGoogle Scholar
  10. 10.
    K. K. M. Pandey, J S Chen, J F Hu and G M Chow, J. Phys. D: Appl. Phys. 42 (2009) 015009.CrossRefGoogle Scholar
  11. 11.
    V. S. N. Murthy, C. Krishnamoorthi, R. Mahendiran, and A. O. Adeyeye, J. Appl. Phys. 105, (2009) 023916.CrossRefGoogle Scholar
  12. 12.
    G. Shimon, A. O. Adeyeye and C. A. Ross, J. Appl. Phys. 111 (2012) 013909.CrossRefGoogle Scholar
  13. 13.
    G. Shimon, A. O. Adeyeye, and C. A. Ross, Phys. Rev. B 89 (2014) 024302.CrossRefGoogle Scholar
  14. 14.
    R. Morales, A. C. Basaran, J. E. Villegas, D. Navas, N. Soriano, B. Mora, C. Redondo, X. Batlle, and I. K. Schuller, Phys. Rev. Lett. 114 (2015) 097202.CrossRefGoogle Scholar
  15. 15.
    D. M. Burn, M. Chadha, and W. R. Branford, Phys. Rev. B 92 (2015) 214425.CrossRefGoogle Scholar
  16. 16.
    P. Lupo, Z. Haghshenasfard, M. G. Cottam, and A. O. Adeyeye, Phys. Rev. B 94 (2016) 214431.CrossRefGoogle Scholar
  17. 17.
    M. J. Donahue and D. G. Porter, OOMMF user’s guide, version 1.0. interagency report NISTIR 6376, National institute of standards and technology, Gaithersburg, MD, 1999. http://math.nist.gov/oommf/doc/userguide12a3/userguide/Credits.html. Accessed 25 Jan 2017.
  18. 18.
    E. C. Stoner, E. P. Wohlfarth, Philos. Trans. R. Soc. A 240 (1948) 559.CrossRefGoogle Scholar
  19. 19.
    P. Vavassori, N.Zaluzec, V. Metlushko, V. Novosad, B. Ilic and M. Grimsditch, Phy. Rev. B 69 (2004) 214404.CrossRefGoogle Scholar
  20. 20.
    N. V. S. S.Seshagirirao, V. S. N. Murthy and Y. J. V. S. Ramakrishna Sharma, Bull. Mater. Sci. 393 (2016) 725.CrossRefGoogle Scholar
  21. 21.
    M. F. Lai, Z. H. Wei, J. C. Wu, C. R. Chang, W. Z. Hsieh and J. Y. Lai, IEEE Trans. Magn. 41 (2005) 944.CrossRefGoogle Scholar
  22. 22.
    A. Fernandez and C. J. Cerjan, J. Appl. Phys. 87 (2000) 1395.CrossRefGoogle Scholar
  23. 23.
    Z. -H. Wei, C.-R. Chang, N. A. Usov, M. -F. Lai and J. C. Wu, J. Magm. Magn. Matter. 95 (2002) 1.CrossRefGoogle Scholar

Copyright information

© The Indian Institute of Metals - IIM 2017

Authors and Affiliations

  • N. V. S. S. Seshagiri Rao
    • 1
  • V. Satya Narayana Murthy
    • 1
  1. 1.Department of PhysicsBirla Institute of Technology & Science –PilaniHyderabadIndia

Personalised recommendations