Configurational anisotropy in nanomagnets

  • Cowburn R
  • Adeyeye A
  • Welland M
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A novel magneto-optical method has been used to probe theinternal magnetic energy surface in 150 x 150 x 15 nm(3) squareNi80Fe14Mo5 ("supermalloy") nanomagnets which were fabricatedby electron beam lithography. A strong fourfold symmetricanisotropy field of strength 365 20 Oe is found, whichconfirms a recent prediction of the appearance of aconfigurational anisotropy due to the small deviations of themagnetization from the uniform state.

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  • R. P. Cowburn

  • A. O. Adeyeye

  • M. E. Welland

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