Vibrational Properties of Nanograins and Interfaces in Nanocrystalline Materials

Journal Article · Fri Jun 13 00:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.235503· OSTI ID:21134028

Stankov, S; Sergueev, I; Chumakov, A I; Rueffer, R ^[1]; Yue, Y Z; Hu, L ^[2]; Miglierini, M ^[3]; Sepiol, B ^[4]; Svec, P ^[5]

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1. European Synchrotron Radiation Facility, BP220, 38043 Grenoble (France)
2. Section of Chemistry, Aalborg University, 9000 Aalborg (Denmark)
3. Department of Nuclear Physics and Technology, Slovak University of Technology, 81219 Bratislava (Slovakia)
4. Faculty of Physics, University of Vienna, 1090 Vienna (Austria)
5. Institute of Physics, Slovak Academy of Sciences, 84511 Bratislava (Slovakia)

The vibrational dynamics of nanocrystalline Fe{sub 90}Zr{sub 7}B{sub 3} was studied at various phases of crystallization. The density of phonon states (DOS) of the nanograins was separated from that of the interfaces for a wide range of grain sizes and interface thicknesses. The DOS of the nanograins does not vary with their size and down to 2 nm grains still closely resembles that of the bulk. The anomalous enhancement of the phonon states at low and high energies originates from the DOS of the interfaces and scales linearly to their atomic fraction.

• OSTI ID: 21134028
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 23 Vol. 100; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTALLIZATION
CRYSTALS
GRAIN SIZE
INTERFACES
IRON BORIDES
NANOSTRUCTURES
PHONONS
ZIRCONIUM BORIDES