Low-frequency acoustic study of ferroelastic phase transitions in Ba2NaNb5O15

Authors
Gridnev, SA Biryukov, AV Ivanov, ON
Citation
Sa. Gridnev et al., Low-frequency acoustic study of ferroelastic phase transitions in Ba2NaNb5O15, FERROELEC L, 25(1-2), 1999, pp. 11-15
Citations number
7
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
FERROELECTRICS LETTERS SECTION
ISSN journal
07315171 → ACNP
Volume
25
Issue
1-2
Year of publication
1999
Pages
11 - 15
Database
ISI
SICI code
0731-5171(1999)25:1-2<11:LASOFP>2.0.ZU;2-6
Abstract
The peculiarities of low-frequency internal friction near the first order l ow-temperature (110K) and second order high-temperature (573 K) phase trans itions in improper Ba2NaNb5O15 ferroelastic were studied. A large and wide internal friction peak and diffused step-like change in the temperature dep endence of shear modulus were also observed within an incommensurate phase between these two phase transitions.