Formation of a non-magnetic metallic iron nitride layer on bcc Fe(100)

Details Formation of a non-magnetic metallic iron nitride layer on bcc Fe(100) Formation of a non-magnetic metallic iron nitride layer on bcc Fe(100)

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010njph...12g3004n&link_type=abstract

New Journal of Physics, Volume 12, Issue 7, pp. 073004 (2010).

Physics

1

Scientific paper

We report the formation of a stable iron nitride thin film following the exposition of an Fe(001) single crystal to atomic N plasma produced by means of a radio-frequency (rf) discharge source. The obtained phase, enabled by N-atomic diffusion into the iron matrix, has been characterized using spectroscopical and structural techniques. The comparison of the experimental results with first-principles calculations sheds light on the formed structure stability. The result is the formation of a metallic non-magnetic protective coating film on the iron substrate with a zinc blende (ZB) structure (γ''-FeN). The formed film has high oxidation resistance, metallic character, non-magnetic ground state and good epitaxial growth. Thermal treatment of the iron nitride film shows that, at around 700 K, the FeN is decomposed, resulting in bcc Fe as a consequence of the high diffusivity of N in Fe.

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