Unusual pressure response of the E2g mode and elastic shear modulus C44 in hcp scandium

H. Olijnyk, S. Nakano, A. P. Jephcoat, K. Takemura

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Abstract

Scandium (Sc) was studied by Raman spectroscopy to pressures up to 20GPa. The E2g mode frequency increases throughout the stability field of the hexagonal-close-packed (hcp) phase, which contrasts the softening of this mode observed in its heavier homologue Y and the related regular lanthanides. The unusually low mode Grüneisen parameter and the small increase of elastic modulus C44 are discussed with respect to pressure-induced changes of the electronic structure.

Original languageEnglish
Article number024
Pages (from-to)10971-10976
Number of pages6
JournalJournal of Physics Condensed Matter
Volume18
Issue number48
DOIs
Publication statusPublished - Dec 6 2006
Externally publishedYes

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ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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