Electrical conductivity and complex impedance analysis of 20% Ti-doped La0.7Sr0.3MnO3 perovskite
Creators
- 1. Laboratoire de Physique des Materiaux et des Nanomateriaux appliquee a l'Environnement, Faculte des Sciences de Gabes cite Erriadh 6079 Gabes (Tunisia)
- 2. Laboratoire de Physico-Chimie des Materiaux, Departement de Physique, Faculte des Sciences de Monastir B. P. 22. 5019 Monastir (Tunisia)
- 3. Laboratoire de Physique des Semiconducteurs et des Composants Electroniques, Faculte des Sciences de Monastir, Avenue de l'Environnement 5018 Monastir (Tunisia)
Description
The electrical conductance of 20% Ti-doped La0.7Sr0.3MnO3 (LSMO) was measured using admittance spectroscopy over a wide temperature and frequency ranges. The impedance plane plot shows semicircle arcs at different temperatures and an electrical equivalent circuit has been proposed to explain the impedance results. Activation energy inferred from conductance spectrum matches very well with the value estimated from relaxation time indicating that relaxation process and conductivity have the same origin. The electrical conductance of La0.7Sr0.3Mn0.8Ti0.2O3 is found to be dependent on temperature and frequency. Also, the electronic conduction appears to be dominated by thermally activated hopping of small polaron (SPH) at high temperatures and by variable range hopping (VRH) at low temperatures
Additional details
Identifiers
- DOI
- 10.1016/j.jmmm.2007.03.208;
- PII
- S0304-8853(07)00540-9;
Publishing Information
- Journal Title
- Journal of Magnetism and Magnetic Materials
- Journal Volume
- 316
- Journal Issue
- 1
- Journal Page Range
- p. 23-28
- ISSN
- 0304-8853
- CODEN
- JMMMDC
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 39032890
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ACTIVATION ENERGY; DOPED MATERIALS; ELECTRIC CONDUCTIVITY; FREQUENCY RANGE; GRAIN BOUNDARIES; IMPEDANCE; LANTHANUM COMPOUNDS; MANGANESE COMPOUNDS; OXIDES; PEROVSKITE; RELAXATION TIME; SPECTRA; SPECTROSCOPY; STRONTIUM COMPOUNDS; TITANIUM COMPOUNDS
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; ELECTRICAL PROPERTIES; ENERGY; MATERIALS; MICROSTRUCTURE; MINERALS; OXIDE MINERALS; OXYGEN COMPOUNDS; PEROVSKITES; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Copyright
- Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.