Off-axis electron holography of exchange-biased CoFe/FeMn patterned nanostructures

R. E. Dunin-Borkowski, Martha McCartney, B. Kardynal, M. R. Scheinfein, David Smith, S. S P Parkin

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Off-axis electron holography and micromagnetic simulations have been used to investigate magnetization reversal mechanisms and remanent states in exchange-biased submicron Co84Fe16/Fe54Mn46 patterned elements. Domain structures within the elements were characterized despite the narrow thickness (∼3 nm) of the ferromagnetic layer relative to the total element thickness (∼42 nm). Individual elements were able to support different remanent states and their magnetic microstructure was sensitive to their size. The simulations confirmed that the coercivities of the elements and their domain structures were highly sensitive to the strength and orientation of the pinning field. A good fit to the experimental data was provided by using an interface exchange field that had a fixed amplitude and direction in the simulations, and small disagreements were attributed to structural imperfections. These differences emphasize the value of an experimental technique such as electron holography for probing local micromagnetic structure in individual nanostructured elements.

Original languageEnglish (US)
Pages (from-to)2899-2902
Number of pages4
JournalJournal of Applied Physics
Volume90
Issue number6
DOIs
StatePublished - Sep 15 2001

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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