(4)A(2)) of the Cr3+ impurity centres were studied in SrTiO3 (STO), Sr0.99Mg0.01TiO3 (SMT) and SrTi0.99Mg0.01O3 (STM) ceramics. In STO, epsilon increases on cooling revealing a weak dispersion in the 100 Hz-1 MHz region at low temperatures. SMT shows nearly the same behaviour. In STM the low-frequency permittivity reveals a wide maximum at similar to36 K with pronounced relaxation-type dispersion. However, in the THz region no epsilon' (T) anomaly was found in all the materials under study. All the compositions studied-STO, SMT and STM demonstrate large "dielectric-related" temperature shift of Cr3+ R-emission line but this shift seems to be associated not only with TO1 soft mode but also with the relaxation process."/> (4)A(2)) of the Cr3+ impurity centres were studied in SrTiO3 (STO), Sr0.99Mg0.01TiO3 (SMT) and SrTi0.99Mg0.01O3 (STM) ceramics. In STO, epsilon increases on cooling revealing a weak dispersion in the 100 Hz-1 MHz region at low temperatures. SMT shows nearly the same behaviour. In STM the low-frequency permittivity reveals a wide maximum at similar to36 K with pronounced relaxation-type dispersion. However, in the THz region no epsilon' (T) anomaly was found in all the materials under study. All the compositions studied-STO, SMT and STM demonstrate large "dielectric-related" temperature shift of Cr3+ R-emission line but this shift seems to be associated not only with TO1 soft mode but also with the relaxation process."/>
 
Dielectric permittivity and Cr3+ impurity luminescence of Sr0.99M0.01TiO3 and SrTi0.99Mg0.01O3
authors Trepakov, VA; Savinov, ME; Kudyk, IB; Pashkin, A; Kapphan, SE; Vilarinho, PM; Tkach, A; Kholkin, AL; Jastrabik, L
nationality International
journal FERROELECTRICS
author keywords incipient ferroelectrics; doping effect; Cr3+ luminescence
keywords SPECTROSCOPY
abstract Dielectric permittivity epsilon' and a "dielectric-related" temperature shift of the R-emission line (E-2-->(4)A(2)) of the Cr3+ impurity centres were studied in SrTiO3 (STO), Sr0.99Mg0.01TiO3 (SMT) and SrTi0.99Mg0.01O3 (STM) ceramics. In STO, epsilon increases on cooling revealing a weak dispersion in the 100 Hz-1 MHz region at low temperatures. SMT shows nearly the same behaviour. In STM the low-frequency permittivity reveals a wide maximum at similar to36 K with pronounced relaxation-type dispersion. However, in the THz region no epsilon' (T) anomaly was found in all the materials under study. All the compositions studied-STO, SMT and STM demonstrate large "dielectric-related" temperature shift of Cr3+ R-emission line but this shift seems to be associated not only with TO1 soft mode but also with the relaxation process.
publisher TAYLOR & FRANCIS LTD
issn 0015-0193
year published 2003
volume 294
beginning page 229
ending page 238
digital object identifier (doi) 10.1080/00150190390238946
web of science category Materials Science, Multidisciplinary; Physics, Condensed Matter
subject category Materials Science; Physics
unique article identifier WOS:000186527000024
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  impact metrics
journal analysis (jcr 2019):
journal impact factor 0.669
5 year journal impact factor 0.718
category normalized journal impact factor percentile 9.089
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