A new phase transition in sodium niobate

Authors
Raevskii, IP Reznichenko, LA Smotrakov, VG Eremkin, VV Malitskaya, MA Kuznetsova, EM Shilkina, LA
Citation
Ip. Raevskii et al., A new phase transition in sodium niobate, TECH PHYS L, 26(8), 2000, pp. 744-746
Citations number
14
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
TECHNICAL PHYSICS LETTERS
ISSN journal
10637850 → ACNP
Volume
26
Issue
8
Year of publication
2000
Pages
744 - 746
Database
ISI
SICI code
1063-7850(2000)26:8<744:ANPTIS>2.0.ZU;2-0
Abstract
The temperature dependences of the dielectric constant epsilon of sodium ni obate single crystals NaNbO3 and sodium niobate-based (Na,Li)NbO3 and (Na,K )NbO3 solid solutions with low content of the second component have been st udied. A weak anomaly observed in epsilon(T) indicates a new phase transiti on in the vicinity of 150 degrees C in NaNbO3 . The introduction of lithium or potassium into NaNbO3 crystals increases the temperature of this transi tion. The X-ray powder diffraction data suggest that the new transition tak es place between two rhombohedral phases. (C) 2000 MAIK "Nauka/Interperiodi ca".