Spin polarization of Fe4N thin films determined by point-contact Andreev reflection

A. Narahara*, K. Ito, T. Suemasu, Y. K. Takahashi, A. Ranajikanth, K. Hono

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)

Abstract

The spin polarization of (100)-oriented γ′ -Fe4 N layers grown on MgO(001) substrates by molecular beam epitaxy was deduced from point contact Andreev reflection measurements, and the value was compared with that of α-Fe. The spin polarization (P) for γ′-Fe4 N is approximately 0.59 at 7.8 K. This value is distinctly larger than that for α-Fe (P=0.49 at 7.8 K) measured with an identical setting. The mechanism of enhanced spin polarization in γ′ -Fe4 N is discussed.

Original languageEnglish
Article number202502
JournalApplied Physics Letters
Volume94
Issue number20
DOIs
Publication statusPublished - 2009
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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