Chemical shift of the nitrogen electrons in Fe16N2(001) single crystal films epitaxially grown by molecular beam epitaxy

H. Takahashi, M. Igarashi, A. Sakuma, Y. Sugita

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)

Abstract

The spectra of X-ray photoelectron spectroscopy (XPS) were measured for Fe16N2(001) single crystal films epitaxially grown by molecular beam epitaxy (MBE). It was found that the binding energy of N-1s (EN1S) of Fe16N2 is lower than that of Fe4N, indicating that the energy level of N-1s electron in Fe16N2 is higher due to the larger value of the electron-electron Coulomb energy within N atom. From this result, it is expected that more electrons transfer from N atoms to N atoms in Fe16N2 than in Fe4 N. It is likely that the N atoms in Fe16N2 act as electron acceptors and this can lead to the nearly full spin polarization in each Fe atoms with a ferromagnetic coupling due to electron hopping.

Original languageEnglish
Pages (from-to)2921-2923
Number of pages3
JournalIEEE Transactions on Magnetics
Volume36
Issue number5 I
DOIs
Publication statusPublished - 2000 Sep
Externally publishedYes
Event2000 International Magnetics Conference (INTERMAG 2000) - Toronto, Ont, Canada
Duration: 2000 Apr 92000 Apr 12

Keywords

  • Binding energy
  • Chemical shift
  • Fe-N martensite
  • FeN
  • FeN
  • N concentration
  • Saturation magnetization
  • X-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

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