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Title: Cathodoluminescence from Mixed KTaO3-KNbO3 Crystals

Abstract

Cathodoluminescence spectra are shown for a sequence of mixed crystals of KTaO{sub 3}:KNbO{sub 3}. The luminescence emission bands are broadly similar across the spectrum from 250 to 850 nm, although their relative strengths are sensitive to composition and temperature. A UV band near 330 nm is only well resolved in some compositions and a broad line near 700 nm may arise from Cr ions. The presence of low temperature phase transitions within the crystals is evidenced by intensity steps and spectral changes of the cathodoluminescence. Hysteresis is seen, as are domain effects and electric field shifts of the transition temperatures. The cathodoluminescence of the surface material reveals more transitions than are reported from earlier bulk studies.

Authors:
 [1];  [2];  [3];  [1];  [4]
  1. University of Sussex, Brighton, UK
  2. University of Sussex, Brighton, UK, Ege University, Izmir, Turkey
  3. University of Sussex, Brighton, UK, Beijing Normal University, Beijing, China
  4. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
979580
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physica Status Solidi C; Journal Volume: 4; Journal Issue: 3
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CATHODOLUMINESCENCE; POTASSIUM OXIDES; TANTALUM OXIDES; NIOBIUM OXIDES; SPECTRA; PHASE TRANSFORMATIONS

Citation Formats

Nunn, P. J. T., Kibar, R., Wang, Y., Townsend, P. D., and Boatner, Lynn A. Cathodoluminescence from Mixed KTaO3-KNbO3 Crystals. United States: N. p., 2007. Web.
Nunn, P. J. T., Kibar, R., Wang, Y., Townsend, P. D., & Boatner, Lynn A. Cathodoluminescence from Mixed KTaO3-KNbO3 Crystals. United States.
Nunn, P. J. T., Kibar, R., Wang, Y., Townsend, P. D., and Boatner, Lynn A. Mon . "Cathodoluminescence from Mixed KTaO3-KNbO3 Crystals". United States. doi:.
@article{osti_979580,
title = {Cathodoluminescence from Mixed KTaO3-KNbO3 Crystals},
author = {Nunn, P. J. T. and Kibar, R. and Wang, Y. and Townsend, P. D. and Boatner, Lynn A},
abstractNote = {Cathodoluminescence spectra are shown for a sequence of mixed crystals of KTaO{sub 3}:KNbO{sub 3}. The luminescence emission bands are broadly similar across the spectrum from 250 to 850 nm, although their relative strengths are sensitive to composition and temperature. A UV band near 330 nm is only well resolved in some compositions and a broad line near 700 nm may arise from Cr ions. The presence of low temperature phase transitions within the crystals is evidenced by intensity steps and spectral changes of the cathodoluminescence. Hysteresis is seen, as are domain effects and electric field shifts of the transition temperatures. The cathodoluminescence of the surface material reveals more transitions than are reported from earlier bulk studies.},
doi = {},
journal = {Physica Status Solidi C},
number = 3,
volume = 4,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}