Abstract
Conversion-electron Mössbauer spectra of epitaxial α″-Fe16N2 and α′-Fe8N films have been studied and their differences are discussed in detail. The Mössbauer spectrum of α″-Fe16N2 can be decomposed into three subspectra, which correspond to the 4d, 8h and 4c sites. The Mössbauer spectrum of α′-Fe8N can be fitted using four spectra based on a nitrogen-atom-random-distribution model. The average hyperfine field is larger (3%) for α″-Fe16N2 than for α′-Fe8N, which is approximately consistent with a 4.1% enhancement of the magnetic moments for α″-Fe16N2. The iron moments tend to locate in the film plane for α″-Fe16N2 and to arrange perpendicularly to the film plane for α′-Fe8N.
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Li, Z.W., Morrish, A.H. & Ortiz, C. Mössbauer studies of α″-Fe16N2 and α′-Fe8N films. Journal of Materials Science 36, 5835–5838 (2001). https://doi.org/10.1023/A:1012912323318
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DOI: https://doi.org/10.1023/A:1012912323318