Abstract
Incoherent nuclear resonant absorption of synchrotron radiation at the 14.413 keV nuclear resonance of 57Fe was employed to measure directly the Fe-projected (partial) phonon density of states (DOS) in epitaxial FeCr(0 0 1) superlattices and in an 57Fe0.03Cr0.97(0 0 1) alloy film MBE-grown on MgO(0 0 1). The measurements were performed at 300 K with 2.3 meV energy resolution around 14.413 keV. At the interfaces, longitudinal vibrations of Fe atoms are suppressed, and a strong resonance phonon mode appears near 23 meV.
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Ruckert, T., Keune, W., Sturhahn, W. et al. Phonon density of states in epitaxial FE/CR(0 0 1) superlattices. Hyperfine Interactions 126, 363–366 (2000). https://doi.org/10.1023/A:1012670628702
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DOI: https://doi.org/10.1023/A:1012670628702