Published October 29, 2001 | Version v1
Journal article Metadata-only

Characteristics and the nature of the low-frequency dielectric response in moderately concentrated KTaO3:Li

Creators

  • 1. Physics Department, Rostov State University, Rostov on Don (Russian Federation)
  • 2. A.F. Ioffe Physical-Technical Institute, St. Petersburg (Russian Federation)
  • 3. Institute of Physics AS CR, Prague (Czech Republic)
  • 4. FB Physik, University of Osnabrueck, Osnabrueck (Germany)

Description

The temperature-frequency behaviour of the complex dielectric permittivity of K0.957Li0.043TaO3 (KLT) was studied in detail. Below 250 K a pronounced relaxation-type dielectric dispersion occurs with two wide temperature maxima shifted to lower temperatures increasing in magnitude as the alternating-current monitoring frequency decreases. The results obtained are analysed by using a theory proposed considering the coupling of the TO1 soft mode (TO standing for transverse optical) to two Li relaxation modes known in moderately concentrated KLT as π - and (π/2)-relaxations. (author)

Availability note (English)

Available online at the Web site for the Journal of Physics. Condensed Matter (ISSN 1361-6448X) http://www.iop.org/

Additional details

Identifiers

URL
http://www.iop.org/;

Publishing Information

Journal Title
Journal of Physics. Condensed Matter
Journal Volume
13
Journal Issue
43
Journal Page Range
p. 9749-9760
ISSN
0953-8984

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
33018642
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
CRYSTAL DOPING; FREQUENCY DEPENDENCE; LITHIUM ADDITIONS; PERMITTIVITY; POTASSIUM COMPOUNDS; TANTALATES; TEMPERATURE DEPENDENCE
Descriptors DEC
ALKALI METAL COMPOUNDS; ALLOYS; DIELECTRIC PROPERTIES; ELECTRICAL PROPERTIES; LITHIUM ALLOYS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; REFRACTORY METAL COMPOUNDS; TANTALUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS