Energy dependence of radioluminescence spectra from strontium titanate

Y. Wang, Y. Zhao, Z. Zhang, C. Zhao, X. Wu, A.A. Finch, P.D. Townsend

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Abstract X-ray excited luminescence spectra of strontium titanate are reported over the temperature range from 20-300 K. The range includes several crystalline phases, each with different emission spectra. The signals are thermally quenched above ~220 K. There are spectral shifts and intensity changes around the temperatures associated with phase changes and overall there are nominally three spectral emission bands. A remarkable observation is that at fixed lower temperatures the spectra undergo major changes with the energy of the X-rays. A possible cause of the effect is discussed in terms of inner shell excitation from the K shell of the strontium. Comparisons with thermoluminescence spectra from the strontium titanate are reported.
Original languageEnglish
Pages (from-to)17-21
JournalJournal of Luminescence
Volume166
Early online date7 May 2015
DOIs
Publication statusPublished - Oct 2015

Keywords

  • X-ray energy dependence
  • Radioluminescence
  • SrTiO3
  • Low temperature phase changes

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