Published April 1976
| Version v1
Journal article
ESR and ENDOR detection of a change in configuration of the protons surrounding an AsO3H- radical in ferroelectric phase of irradiated KH2AsO4
Creators
- 1. CEA Centre d'Etudes Nucleaires de Grenoble, 38 (France). Lab. de Resonance Magnetique
Description
ESR at variable temperature and ENDOR measurements at 1.5K show that in the ferroelectric phase of KDA a reversible change takes place in the configuration of the protons of the O-H...O hydrogen bonds linking the lattice and a radical defect (created by gamma irradiation) which is identified as AsO3H-. The radical configuration L which is stable in the paraelectric phase is derived from Slater configurations of the lateral type. Under the influence which the surroundings lattice exerts in the ferroelectric phase, the radical configuration is transformed partly to the configuration L1 which derives from the high and low Slater configurations
Abstract (French)
La RPE à température variable et l'ENDOR à 1,5 K nous permettent de montrer qu'en phase ferroélectrique de KDA a lieu un changement réversible de la configuration des protons dans les liaisons hydrogène O—H...O qui relient au réseau un centre radicalaire créé par irradiation aux gammas et que nous identifions à AsO3H-. La configuration radicalaire L stable dans la phase paraélectrique dérive des configurations de Slater du type latéral. Sous l'influence de la contrainte exercée par le milieu en phase ferroélectrique, elle se transforme partiellement en la configuration radicalaire L1 qui dérive des configurations de Slater du type haut et bas.Additional details
Additional titles
- Original title (French)
- Detection par RPE et ENDOR d'un changement de configuration des protons autour d'un radical AsO
Identifiers
Publishing Information
- Journal Title
- Journal de Physique
- Journal Volume
- 37
- Journal Issue
- 4
- Series
- J. Phys. (Paris).
- Journal Page Range
- 407-419
- ISSN
- 0302-0738
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 7266473
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- ARSENATES; CHEMICAL RADIATION EFFECTS; CRYSTAL DEFECTS; ELECTRON SPIN RESONANCE; ENDOR; FERROELECTRIC MATERIALS; POTASSIUM COMPOUNDS; RADICALS; STRUCTURAL CHEMICAL ANALYSIS
- Descriptors DEC
- ALKALI METAL COMPOUNDS; ARSENIC COMPOUNDS; CRYSTAL STRUCTURE; DIELECTRIC MATERIALS; MAGNETIC RESONANCE; OXYGEN COMPOUNDS; RADIATION EFFECTS; RESONANCE
Optional Information
- Notes
- Updated automatically by Metadata and Full-Text Enrichment Agent