6533b873fe1ef96bd12d4b17
RESEARCH PRODUCT
Electrical conductivity and micro-Raman scattering studies of ionic conduction in Li1−xHxIO3 solid solutions
Ariete RighiJ.-m. CrettezRoberto L. MoreiraM. A. S. OliveiraMarcos A. PimentaPatrice Boursonsubject
Phase transitionChemistryInorganic chemistryAnalytical chemistryGeneral ChemistryCondensed Matter PhysicsThermal conductionsymbols.namesakeElectrical resistivity and conductivityVacancy defectsymbolsIonic conductivityGeneral Materials ScienceRaman spectroscopyRaman scatteringSolid solutiondescription
Abstract Li 1− x H x IO 3 solid solutions have been investigated by ac electrical conductivity and micro-Raman techniques, for x ≤0.32. The presence of protons leads to a continuous reduction of the anisotropic intrinsic conduction of the system. The in-plane conduction mechanism would be by Li + vacancy hopping, while a mixed process by interstitial Li + and H + would account for the conduction along the c -axis. The solid solutions undergo the same phase transition sequence as the pure crystal, but the presence of the protons shifts the transition temperatures to lower values. Micro-Raman spectroscopy has been successfully introduced to demonstrate that proton mobility occurs preferentially along the c -axis.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-05-01 | Solid State Ionics |