Effect of uniaxial stress on the 130 k and 93 k phase transitions in k2seo4

D. P. Billesbach, F. G. Ullman, J. R. Hardy

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7 Scopus citations

Abstract

The uniaxial stress dependencies of the 130 K(Ti) and 93 K(Tc) transitions in K2SeO4 were determined from measurements of birefringence anomalies at T1, and capacitance anomalies at Tc. At T1 for crystal axes defined as c<a<b, we obtain: -17.0±0.2 K/kbar for stress along “c”, 3.1 ±0.2 K/kbar for stress along “a”, and 7.7 ± 0.2 K/kbar for stress along “b”. Summing these three values gives the hydrostatic pressure dependence of -6.2 K/kbar, close to the reported experimental values of about -6.5 K/kbar. Capacitance vs temperature data, for stress along “c” only, in the vicinity of 93 K were fitted to a Curie-Weiss law to determine the transition temperatures. A value of about -25K/kbar for the oaxis stress dependence of Tc was found.

Original languageEnglish (US)
Pages (from-to)775-777
Number of pages3
JournalJapanese Journal of Applied Physics
Volume24
DOIs
StatePublished - Jan 1985

ASJC Scopus subject areas

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

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