Published February 22, 2006
| Version v1
Journal article
Lattice dynamics calculations and temperature dependence of vibrational modes of ferroelastic Li2TiGeO5
- 1. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, PO Box 1410, 50-950 Wroclaw 2 (Poland)
- 2. Institute of Physics, Wroclaw University of Technology, Wybrzeze, Wyspianskiego 27, 50-370 Wroclaw (Poland)
- 3. Department of Bioorganic Chemistry, Faculty of Industry and Economics, Wroclaw University of Economics, 118/120 Komandorska Street, 53-345 Wroclaw (Poland)
Description
Raman and polycrystalline IR spectra were obtained for Li2TiGeO5 and the assignment of the observed bands to the respective internal and external phonons has been proposed on the basis of lattice dynamics calculations. Temperature dependences of Raman- and IR-active phonons are also reported to probe the paraelastic-ferroelastic phase transition that takes place at 233.5 K. This study shows that the phase transition is continuous and that this phase transition leads to significant distortion of the unit cell
Availability note (English)
Available online at http://stacks.iop.org/0953-8984/18/2137/cm6_7_003.pdf or at the Web site for the Journal of Physics. Condensed Matter (ISSN 1361-648X) http://www.iop.org/Additional details
Identifiers
- URL
- http://stacks.iop.org/0953-8984/18/2137/cm6_7_003.pdf;
- DOI
- 10.1088/0953-8984/18/7/003;
- PII
- S0953-8984(06)14499-9;
Publishing Information
- Journal Title
- Journal of Physics. Condensed Matter
- Journal Volume
- 18
- Journal Issue
- 7
- Journal Page Range
- p. 2137-2147
- ISSN
- 0953-8984
- CODEN
- JCOMEL
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 37061365
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- GERMANATES; INFRARED SPECTRA; LITHIUM COMPOUNDS; PHASE TRANSFORMATIONS; PHONONS; POLYCRYSTALS; TEMPERATURE DEPENDENCE; TITANIUM COMPOUNDS; VIBRATIONAL STATES
- Descriptors DEC
- ALKALI METAL COMPOUNDS; CRYSTALS; ENERGY LEVELS; EXCITED STATES; GERMANIUM COMPOUNDS; OXYGEN COMPOUNDS; QUASI PARTICLES; SPECTRA; TRANSITION ELEMENT COMPOUNDS