Quantitative shadow technique for the investigation of magnetic domain wall widths

G. Pozzi, Marco Beleggia, M. A. Schofield, Y. Zhu

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Quantitative measurement of domain wall widths in a magnetic thin foil of Nd2Fe14B and a patterned Ni88Fe12 Permalloy element is obtained by the analysis of coherent shadow deformation of an electrostatic biprism in an electron microscope. Information related to the phase gradient in the direction perpendicular to the biprism is extracted by comparing the recorded shadow images with simulations computed according to the experimental electron optical configuration and by varying a single free parameter: the domain wall width. We demonstrate the feasibility of such experiments and the usefulness of the technique for characterization of magnetic features at different length scales.
Original languageEnglish
Article number152506
JournalApplied Physics Letters
Volume88
Issue number15
ISSN0003-6951
DOIs
Publication statusPublished - 2006
Externally publishedYes

Keywords

  • PHYSICS,
  • INTERFERENCE ELECTRON-MICROSCOPY
  • OPTICAL PHASE-SHIFTS
  • ASYMPTOTIC APPROXIMATION
  • IMAGE WAVEFUNCTION

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