New cryogenic phase transitions in SrSnO3

Manoj K. Singh*, J. W. Hong, N. K. Karan, Hyun M. Jang, R. S. Katiyar, S. A. T. Redfern, J. F. Scott

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

Strontium stannate is under study as an ultra-stable dielectric material for microelectronic applications at low temperatures. It is known to have a remarkably temperature-independent dielectric constant from 27 K to room temperature. However, we report anomalies in the Raman spectra, dielectric response, and differential thermal analysis of strontium stannate compatible with a structural phase transition at 160 K. Further anomalies are seen in calorimetric and Raman data (but not dielectric data) that suggest another phase transition at 270 K. A preliminary x-ray powder diffraction study confirms a small change in the pseudo-cubic lattice constant a(T) at the lower transition.

Original languageEnglish
Article number095901
Number of pages4
JournalJournal of Physics: Condensed Matter
Volume22
Issue number9
DOIs
Publication statusPublished - 10 Mar 2010

Keywords

  • PEROVSKITE
  • MANTLE
  • SR

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