Structural Phase Transition Peculiarities in Ion-Molecular Perchlorate Crystals

Structural Phase Transition Peculiarities in Ion-Molecular Perchlorate Crystals

Molecular relaxation processes are inspected in potassium and cesium perchlorates (KClO 4 and CsClO 4 , respectively) via Raman spectroscopy. A first-order phase transition in KClO 4 and CsClO 4 crystal perchlorates is found to be extended. A pretransition region is also detected in KClO 4 and CsClO...

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Veröffentlicht in:Physics of the solid state 2018-06, Vol.60 (6), p.1203-1213
Hauptverfasser: Aliev, A. R., Gafurov, M. M., Akhmedov, I. R., Kakagasanov, M. G., Aliev, Z. A.
Format: Artikel
Sprache:eng
Schlagworte:
Alloys
Cesium
CESIUM PERCHLORATES
Chlorates
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTALS
Molecular chains
MOLECULAR IONS
Molecular relaxation
Perchlorates
PHASE TRANSFORMATIONS
Phase Transitions
Physics
Physics and Astronomy
POTASSIUM
POTASSIUM PERCHLORATES
RAMAN SPECTROSCOPY
RELAXATION
Solid State Physics
VIBRATIONAL STATES
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Zusammenfassung:Molecular relaxation processes are inspected in potassium and cesium perchlorates (KClO 4 and CsClO 4 , respectively) via Raman spectroscopy. A first-order phase transition in KClO 4 and CsClO 4 crystal perchlorates is found to be extended. A pretransition region is also detected in KClO 4 and CsClO 4 systems, wherein the vibrational band widths are shown to remain almost unchanged, but abruptly increase at the phase transition point.
ISSN:1063-7834
1090-6460
DOI:10.1134/S1063783418060045