Cubic domains in tetragonal ZnGeP2 single crystals

Yehoshua Shimony, O. Raz, M. P. Dariel, Giora Kimmel

Research output: Contribution to journalConference articlepeer-review

5 Scopus citations

Abstract

ZnGeP2 crystallizes congruently through an β->α phase transition. The high temperature β-phase has a diamond-like cubic structure, with Zn and Ge ions randomly distributed on the metal sublattice. The α-ZnGeP2 crystal has an ordered tetragonal (chalcopyrite) structure, in which the Zn and Ge ions occupy different crystallographic sites. In the present study, good quality ZnGeP2 crystals have been grown by means of the Horizontal Gradient Freezing technique. A small amount of coherently oriented domains of the cubic β-ZnGeP2 structure was identified, however, within the tetragonal ZnGeP2 crystals, indicating an incomplete transition. The β-ZnGeP2 phase was partially retained by rapid quenching from the melt.

Original languageEnglish
Pages (from-to)277-284
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3110
DOIs
StatePublished - 1 Dec 1997
Event10th Meeting on Optical Engineering in Israel - Jerusalem, Israel
Duration: 2 Mar 19972 Mar 1997

Keywords

  • Coherent domains
  • Crystal growth
  • Order-disorder transition
  • Rietveld analysis
  • X-ray diffraction
  • Zinc germanium phosphide

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