Compositional Dependence and Structure of Hydroxyl Ion Defects in Ferroelectric Potassium Lithium Niobate

Autor:	Ágnes Péter, László Kovács, Krisztián Lengyel, Ivett Hajdara, Zsuzsanna Szaller, G. Dravecz
Rok vydání:	2008
Předmět:	Materials science Hydrogen bond Analytical chemistry Condensed Matter Physics Ferroelectricity Spectral line Electronic Optical and Magnetic Materials Crystal symbols.namesake Molecular vibration symbols Raman spectroscopy Potassium lithium niobate Stoichiometry
Zdroj:	Ferroelectrics. 369:98-107
ISSN:	1563-5112 0015-0193
DOI:	10.1080/00150190802375375
Popis:	The OH– stretch mode spectra have been measured in both ferroelectric (KLN-1) and non-ferroelectric (KLN-2) potassium lithium niobate crystals grown from different melt compositions. O─H bond directions of about 15, 60, and 15 degrees with respect to the c-axis have been determined for the three main OH– bands in KLN-1 peaking at about 3440, 3500, and 3520 cm−1, respectively. Correlations have been found along the growth axis of the crystal between the decrease of the excess Nb content, the change of the hydroxyl band components at 3440 and 3520 cm−1, and the Raman modes at 540 cm−1 and 640 cm−1.
Databáze:	OpenAIRE
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