Phonon density of states in epitaxial FE/CR(0 0 1) superlattices |
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| Authors: | T Ruckert W Keune W Sturhahn MY Hu JP Sutter TS Toellner EE Alp |
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| Institution: | 1. Laboratorium für Angewandte Physik, Gerhard-Mercator-Universit?t, D-47048, Duisburg, Germany
2. Argonne National Laboratory, Advanced Photon Source, Argonne, IL, 60439, USA
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| 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.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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