Vibrational Properties of Nanograins and Interfaces in Nanocrystalline Materials

S. Stankov, Y. Z. Yue, M. Miglierini, B. Sepiol, I. Sergueev, A. I. Chumakov, L. Hu, P. Svec, and R. Rüffer
Phys. Rev. Lett. 100, 235503 – Published 12 June 2008

Abstract

The vibrational dynamics of nanocrystalline Fe90Zr7B3 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.

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  • Received 15 June 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.235503

©2008 American Physical Society

Authors & Affiliations

S. Stankov1, Y. Z. Yue2,3, M. Miglierini4, B. Sepiol5, I. Sergueev1, A. I. Chumakov1, L. Hu2,3, P. Svec6, and R. Rüffer1

  • 1European Synchrotron Radiation Facility, BP220, 38043 Grenoble, France
  • 2Section of Chemistry, Aalborg University, 9000 Aalborg, Denmark
  • 3Key Laboratory of Liquid Structure and Heredity of Materials, Shandong University, 250061 Jinan, China
  • 4Department of Nuclear Physics and Technology, Slovak University of Technology, 81219 Bratislava, Slovakia
  • 5Faculty of Physics, University of Vienna, 1090 Vienna, Austria
  • 6Institute of Physics, Slovak Academy of Sciences, 84511 Bratislava, Slovakia

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Vol. 100, Iss. 23 — 13 June 2008

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