OPTICAL-PROPERTIES OF THE FERROELASTIC PHASE-TRANSITION IN (NH4)4LIH3(SO4)4

Authors
KNITE M SCHRANZ W FUITH A WARHANEK H
Citation
M. Knite et al., OPTICAL-PROPERTIES OF THE FERROELASTIC PHASE-TRANSITION IN (NH4)4LIH3(SO4)4, Journal of physics. Condensed matter, 5(49), 1993, pp. 9099-9104
Citations number
15
Categorie Soggetti
Physics, Condensed Matter
Journal title
Journal of physics. Condensed matter → ACNP
ISSN journal
09538984
Volume
5
Issue
49
Year of publication
1993
Pages
9099 - 9104
Database
ISI
SICI code
0953-8984(1993)5:49<9099:OOTFPI>2.0.ZU;2-0
Abstract
The ferroelastic phase transition in (NH4)4LiH3(SO4)4 at 232 K has bee n studied by birefringence measurements in the temperature range 190-3 00 K. The temperature dependence of the birefringence can be well desc ribed by the Landau theory for a proper ferroelastic phase transition of second order. The domain structure is compatible with the symmetry reduction from the tetragonal to the monoclinic phase.