Cubic-tetragonal phase change of yttria-doped hafnia solid solution: High-resolution X-ray diffraction and Raman scattering

Hirotaka Fujimori, Masatomo Yashima, Satoshi Sasaki, Masato Kakihana, Takeharu Mori, Masahiko Tanaka, Masahiro Yoshimura

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)

Abstract

High-resolution synchrotron X-ray powder diffraction and Raman scattering have demonstrated the existence of tetragonal yttria-doped hafnia solid solution with an axial ratio, cf/af, of unity, but having displacements along the cf-axis from the ideal fluorite position in the oxygen sublattice. The values of cf/af ratio in HfO2-X mol%YO1.5 samples (X=13, 14, and 16) are estimated to be unity with the precision of ±0.00003 from the estimated standard deviation of the peak position and less than ±0.001 from the full-width at the half-maximum of the 400f reflection peak. However, the Raman spectra of the samples of X=13, 14, and 16 clearly demonstrate the tetragonal phase.

Original languageEnglish
Pages (from-to)217-223
Number of pages7
JournalChemical Physics Letters
Volume346
Issue number3-4
DOIs
Publication statusPublished - 2001 Oct 5

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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