Phonon density of states in epitaxial FE/CR(001) superlattices

Authors
Ruckert, T Keune, W Sturhahn, W Hu, MY Sutter, JP Toellner, TS Alp, EE
Citation
T. Ruckert et al., Phonon density of states in epitaxial FE/CR(001) superlattices, HYPER INTER, 126(1-4), 2000, pp. 363-366
Citations number
5
Categorie Soggetti
Physics
Journal title
HYPERFINE INTERACTIONS
ISSN journal
03043843 → ACNP
Volume
126
Issue
1-4
Year of publication
2000
Pages
363 - 366
Database
ISI
SICI code
0304-3843(2000)126:1-4<363:PDOSIE>2.0.ZU;2-2
Abstract
Incoherent nuclear resonant absorption of synchrotron radiation at the 14.4 13 keV nuclear resonance of Fe-57 was employed to measure directly the Fe-p rojected (partial) phonon density of states (DOS) in epitaxial FeCr(0 0 1) superlattices and in an (Fe0.03Cr0.97)-Fe-57(0 0 1) alloy film MBE-grown on MgO(0 0 1). The measurements were performed at 300 K with 2.3 meV energy r esolution around 14.413 keV. At the interfaces, longitudinal vibrations of Fe atoms are suppressed, and a strong resonance phonon mode appears near 23 meV.