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

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

doi:10.1088/0953-8984/18/48/024

Unusual pressure response of the E_2g mode and elastic shear modulus C₄₄ in hcp scandium

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

Institute for Planetary Materials

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

Scandium (Sc) was studied by Raman spectroscopy to pressures up to 20GPa. The E_2g 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 language	English
Article number	024
Pages (from-to)	10971-10976
Number of pages	6
Journal	Journal of Physics Condensed Matter
Volume	18
Issue number	48
DOIs	https://doi.org/10.1088/0953-8984/18/48/024
Publication status	Published - Dec 6 2006

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

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AU - Nakano, S.

AU - Jephcoat, A. P.

AU - Takemura, K.

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AB - 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.

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