Mössbauer study on epitaxial CoxFe4- xN films grown by molecular beam epitaxy

Keita Ito, Tatsunori Sanai, Yoko Yasutomi, Toshiki Gushi, Kaoru Toko, Hideto Yanagihara, Masakiyo Tsunoda, Eiji Kita, Takashi Suemasu

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4 Citations (Scopus)

Abstract

We prepared CoxFe4- xN (x = 0, 1, 3) films on SrTiO3(STO)(001) substrates by molecular beam epitaxy. The epitaxial relationship with CoxFe4- xN[100](001) || STO[100](001) was confirmed by ω-2θ (out-of-plane) and ∅-2θχ(in-plane) x-ray diffraction (XRD) measurements. The degree of order of atoms (S) in the CoxFe4- xN films was estimated to be ∼0.5 by the peak intensity ratio of CoxFe4- xN(100) (superlattice diffraction line) to (400) (fundamental diffraction line) in the ∅-2θχXRD patterns. Conversion electron Mössbauer spectroscopy studies for the CoxFe4- xN films revealed that some N atoms are located at interstitial sites between the two nearest corner sites in the CoxFe4- xN films, and/or Fe atoms are located at both the corner and face-centered sites in the CoFe3N and Co3FeN films. In order to realize high spin-polarized CoxFe4- xN films having large S, further optimization of growth condition is required to prevent the site-disorders.

Original languageEnglish
Article number17B717
JournalJournal of Applied Physics
Volume117
Issue number17
DOIs
Publication statusPublished - 2015 May 7

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Ito, K., Sanai, T., Yasutomi, Y., Gushi, T., Toko, K., Yanagihara, H., Tsunoda, M., Kita, E., & Suemasu, T. (2015). Mössbauer study on epitaxial CoxFe4- xN films grown by molecular beam epitaxy. Journal of Applied Physics, 117(17), [17B717]. https://doi.org/10.1063/1.4914342