The volume ratio of domains in the tetragonal phase of KMnF3

A. Okazaki, Y. Soejima, M. Machida

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Abstract

The previous results on the domain volume distribution in the tetragonal phase of KMnF3 with the space group I4/mcm have been re-examined by X-ray and neutron single-crystal diffraction in a temperature range down to 110 K; the transition temperature between the cubic and tetragonal phases is 186.6 K. For a smaller specimen examined with X-rays, the distribution is fairly constant in a temperature region close to the transition, whereas it shows a gradual change at lower temperatures. For a larger specimen examined with neutrons, the distribution is nearly constant over the whole temperature range. The difference in the behaviour can be attributed to the size or shape effect and/or to the different distributions of defects. All the previous data can be explained on the basis of the present results.

Original languageEnglish
Pages (from-to)1041-1045
Number of pages5
JournalJournal of Physics C: Solid State Physics
Volume20
Issue number8
DOIs
Publication statusPublished - Mar 20 1987

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Engineering(all)
  • Physics and Astronomy(all)

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