Open AccessRAMAN SPECTRA STUDY OF FERROELECTRIC PHASE TRANSITION IN LiTaO3
Author(s) -
Guoxiang Lan,
Guangao Li,
Bing Li,
Huafu Wang
Publication year - 1981
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.30.1548
Subject(s) - ferroelectricity , raman spectroscopy , phase transition , materials science , merge (version control) , spectral line , softening , phase (matter) , soft modes , antiferroelectricity , dielectric , condensed matter physics , optics , physics , optoelectronics , quantum mechanics , computer science , composite material , information retrieval
The Raman spectra of LiTaO3 have been studied from 20℃ to 800℃. No softening of ferroelectric mode has been detected. The striking feature of our results is that the Raman spectra of the ferroelectric phase merge into the paraelectric phase without any appreciable discontinuity at the phase transition. On the basis of these new experimental results and the crystal structure data in literature, we suggest that the ferroelectric phase transition in LiTaO3 may have an order-disorder character.