Published April 2005 | Version v1
Journal article Metadata-only

Photo-induced suppression of ferroelectric transition in oxygen-isotope-exchanged SrTiO3

Creators

  • 1. Department of Physics, Graduate School for Science, Kyoto University, Kitashirakawa, Sakyo, Kyoto 606-8502 (Japan)
  • 2. Core Research for Evolutional Science and Technology, Japan Science and Technology Agency (Japan)

Description

We have investigated photo-induced effects in SrTi(16O1-x18O x )3, which undergoes a ferroelectric transition at low temperatures. The ferroelectric transition temperature is lowered by inter-band excitation with ultraviolet light due to the screening of the Coulomb interaction by photo-induced carriers. Considering a microscopic mechanism, we concluded that the critical temperature shift is explained by the hardening of the TO mode with the screening effect. It is suggested that some dipoles with a nanometric size exist in 18O-isotope-exchanged SrTiO3(STO18) and the cooperative interactions among them bring about ferroelectric ordering

Additional details

Identifiers

DOI
10.1016/j.jlumin.2004.09.052;
PII
S0022-2313(04)00369-2;

Publishing Information

Journal Title
Journal of Luminescence
Journal Volume
112
Journal Issue
1-4
Journal Page Range
p. 259-262
ISSN
0022-2313
CODEN
JLUMA8

Conference

Title
6. international conference on excitonic processes in condensed matter
Acronym
EXCON '04
Dates
6-9 Jul 2004
Place
Cracow (Poland)

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
37049374
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference
Descriptors DEI
CRITICAL TEMPERATURE; DIPOLES; EXCITATION; HARDENING; ISOTOPE EFFECTS; OXYGEN 18; PEROVSKITE; STRONTIUM TITANATES; TITANIUM OXIDES; ULTRAVIOLET RADIATION
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; ELECTROMAGNETIC RADIATION; ENERGY-LEVEL TRANSITIONS; EVEN-EVEN NUCLEI; ISOTOPES; LIGHT NUCLEI; MINERALS; MULTIPOLES; NUCLEI; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; OXYGEN ISOTOPES; PEROVSKITES; PHYSICAL PROPERTIES; RADIATIONS; STABLE ISOTOPES; STRONTIUM COMPOUNDS; THERMODYNAMIC PROPERTIES; TITANATES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; TRANSITION TEMPERATURE

Optional Information

Copyright
Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.