Local structural deformation in and crystals observed by positron-annihilation spectroscopy

Yasuyoshi Nagai, Haruo Saito, Toshio Hyodo, Attila Vértes, Károly Süvegh

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The two-dimensional angular correlation spectra of 2γ annihilation radiation (2D-ACAR) from single crystals of (Formula presented) at 30, 150, and 290 K and (Formula presented) at 150 and 290 K have been measured. A structural deformation in (Formula presented) has been observed through the change of the momentum distribution of the positronium. The similarity of the anisotropies of the 2D-ACAR spectra for (Formula presented) and (Formula presented) in the rhombohedral structure indicates that a similar structural deformation also takes place in (Formula presented) This deformation can be the trigger of the spin-crossover transition.

Original languageEnglish
Pages (from-to)14119-14122
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume57
Issue number22
DOIs
Publication statusPublished - Jan 1 1998

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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