Electron holography study of remanence states in exchange-biased MnPd/Fe bilayers grown epitaxially on MgO(001)

Jong Seok Jeong, Zentaro Akase, Daisuke Shindo, Qing Feng Zhan, Kannan M. Krishnan

Research output: Contribution to journalArticlepeer-review

Abstract

We investigated magnetic remanence states of epitaxially grown, exchange-biased MnPd/Fe bilayers by electron holography emphasizing the crystallographic orientations of the layers. Thin-foil transmission electron microscopy (TEM) specimens were carefully prepared along both hard and easy axes of the Fe layer. The ex situ magnetization-reversal process was carried out using the TEM specimens, and magnetic flux densities of the ultra-thin Fe layers were evaluated at different remanence states. We show that a spin configuration in the TEM specimens is determined by the competition between an exchange coupling at the MnPd/Fe bilayer interface, shape anisotropy of TEM specimens and intrinsic magnetocrystalline anisotropy of Fe.

Original languageEnglish
Pages (from-to)235-242
Number of pages8
JournalJournal of Electron Microscopy
Volume60
Issue number3
DOIs
Publication statusPublished - 2011 Jun

Keywords

  • TEM
  • demagnetizing effects
  • electron holography
  • exchange bias
  • magnetic flux density
  • shape anisotropy

ASJC Scopus subject areas

  • Instrumentation

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