THE SEQUENCE OF STRUCTURAL PHASE-TRANSITIONS IN KTA1-XNBXO3

Authors
GLINCHUK MD JASTRABIK L STEPHANOVICH VA
Citation
Md. Glinchuk et al., THE SEQUENCE OF STRUCTURAL PHASE-TRANSITIONS IN KTA1-XNBXO3, Physica. B, Condensed matter, 222(1-3), 1996, pp. 182-190
Citations number
17
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physica. B, Condensed matter → ACNP
ISSN journal
09214526
Volume
222
Issue
1-3
Year of publication
1996
Pages
182 - 190
Database
ISI
SICI code
0921-4526(1996)222:1-3<182:TSOSPI>2.0.ZU;2-#
Abstract
The series of structural phase transitions in KTa1-xNbxO3 is described by a modified Landau free energy functional. The modification is that the phase transition temperature T-c depends on the Nb concentration. The dependence T-c(x) is calculated self-consistently by averaging ov er spatial and thermal fluctuations in Nb subsystem. Good coincidence between theory and experiment is manifested.