Skip to main content
placeholder image

Coherent rotation and effective anisotropy

Journal Article


Download full-text (Open Access)

Abstract


  • It is shown in this paper that the concept of effective anisotropy is of sound physical sense only when the nucleation mode is coherent rotation. Comparison of coherent and incoherent nucleation fields demonstrates that the coherent rotation can take place at very small defect size. The critical size below which the coherent rotation is favorable is roughly the domain wall-width with 3-D soft defects and is smaller for oriented exchange-coupled permanent magnets with planar soft defects. The effect of misaligned grains has also been considered and it is illustrated that the effective anisotropy has to be used very carefully: it can only be used in limited cases and its expression varies as the microstructures change

UOW Authors


  •   Zhao, Guoping (external author)
  •   Wang, Xiaolin
  •   Feng, Y.P (external author)
  •   Huang, C.W (external author)

Publication Date


  • 2007

Citation


  • Zhao, G., Wang, X., Feng, Y. & Huang, C. (2007). Coherent rotation and effective anisotropy. IEEE Transactions on Magnetics, 43 (6), 2908-2910.

Scopus Eid


  • 2-s2.0-34249082126

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=6578&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/3647

Has Global Citation Frequency


Number Of Pages


  • 2

Start Page


  • 2908

End Page


  • 2910

Volume


  • 43

Issue


  • 6

Abstract


  • It is shown in this paper that the concept of effective anisotropy is of sound physical sense only when the nucleation mode is coherent rotation. Comparison of coherent and incoherent nucleation fields demonstrates that the coherent rotation can take place at very small defect size. The critical size below which the coherent rotation is favorable is roughly the domain wall-width with 3-D soft defects and is smaller for oriented exchange-coupled permanent magnets with planar soft defects. The effect of misaligned grains has also been considered and it is illustrated that the effective anisotropy has to be used very carefully: it can only be used in limited cases and its expression varies as the microstructures change

UOW Authors


  •   Zhao, Guoping (external author)
  •   Wang, Xiaolin
  •   Feng, Y.P (external author)
  •   Huang, C.W (external author)

Publication Date


  • 2007

Citation


  • Zhao, G., Wang, X., Feng, Y. & Huang, C. (2007). Coherent rotation and effective anisotropy. IEEE Transactions on Magnetics, 43 (6), 2908-2910.

Scopus Eid


  • 2-s2.0-34249082126

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=6578&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/3647

Has Global Citation Frequency


Number Of Pages


  • 2

Start Page


  • 2908

End Page


  • 2910

Volume


  • 43

Issue


  • 6