THERMAL-STABILITY LIMITS OF POLAR LATAO4

Authors
TITOV YA SYCH AM KAPSHUK AA
Citation
Ya. Titov et al., THERMAL-STABILITY LIMITS OF POLAR LATAO4, Inorganic materials, 34(5), 1998, pp. 496-498
Citations number
9
Categorie Soggetti
Material Science
Journal title
Inorganic materials → ACNP
ISSN journal
00201685
Volume
34
Issue
5
Year of publication
1998
Pages
496 - 498
Database
ISI
SICI code
0020-1685(1998)34:5<496:TLOPL>2.0.ZU;2-#
Abstract
Orthorhombic LaTaO4 was prepared by hydroxide coprecipitation followed by calcination. The orthorhombic form of LaTaO4 is stable in the temp erature range from at least 293 to 1470 K and coexists with monoclinic LaTaO4 below 423 K. The large second-order nonlinear response indicat es that orthorhombic LaTaO4 has a noncentrosymmetric structure. The sp ontaneous polarization in orthorhombic LaTaO4, assessed from the secon d harmonic signal, is P-s similar or equal to 1.6 mu C/cm(2).