Pressure dependence of the phase transition temperature and coupled mode behaviour of the soft phonon in Bi2−nLnTi4O11

Autor:	Zou Guangtian Meng Jinfang, Cui Qi-Liang
Rok vydání:	1994
Předmět:	Phase transition symbols.namesake Phase transition temperature Condensed matter physics Phonon Chemistry Hydrostatic pressure Mode (statistics) symbols Soft modes Pressure dependence Condensed Matter Physics Raman spectroscopy
Zdroj:	High Pressure Research. 12:43-50
ISSN:	1477-2299 0895-7959
Popis:	The Raman spectra of Bi2−nL,nTi4Ol1at hydrostatic pressure and various temperature have been measured by a Diamond Anvil Cell (DAC), with a temperature equipment and a Ramalog system. The results show that the pressure dependence of the phase transition temperature follows Samara's rule and the phase transition is driven by the soft optical mode. Nature of non-zero value of the soft mode frequency at phase transition point has been first discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::082a1916a5de0863a21538d19f5ab468 https://doi.org/10.1080/08957959408201654 Zobrazit plný text záznamu