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Proceedings Paper

Optical nonlinear properties and structural phase transitions in a new promising ferroelectric family LnBXO5 (Ln-La, Pr; X-Ge, Si)
Author(s): B. A. Strukov; B. V. Mill; Eleva L. Belokoneva; S. Yu. Stefanovich; V. N. Sigaev; Yoshiaki Uesu
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Paper Abstract

The new family of ferroelectric oxides presented and some of its properties including nonlinear optical properties of LaBGeO5 (LBGO) are considered. It is shown that these oxides have high Curie temperatures, symmetry change P3121 yields P31 and the mixed displacive and order- disorder type of the phase transitions. All second harmonic generation (SHG) tensor components are determined for LBGO crystals and the magnitude of the spontaneous polarization is evaluated from the vector part of SHG tensor as 2.4 plus or minus 0.8 (mu) C/cm2. The phase transitions in PrBGeO5 and LaBSiO5 crystals are considered taking into account SHG data for powder samples.

Paper Details

Date Published: 4 February 1997
PDF: 6 pages
Proc. SPIE 2967, Optical Inorganic Dielectric Materials and Devices, (4 February 1997); doi: 10.1117/12.266530
Show Author Affiliations
B. A. Strukov, Moscow State Univ. (Russia)
B. V. Mill, Moscow State Univ. (Russia)
Eleva L. Belokoneva, Moscow State Univ. (Russia)
S. Yu. Stefanovich, Karpov Institute of Physical Chemistry (Russia)
V. N. Sigaev, Karpov Institute of Physical Chemistry (Russia)
Yoshiaki Uesu, Waseda Univ. (Japan)

Published in SPIE Proceedings Vol. 2967:
Optical Inorganic Dielectric Materials and Devices
Andris Krumins; Donats K. Millers; Andris R. Sternberg; Janis Spigulis, Editor(s)

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