Optical nonlinear properties and structural phase transitions in a new promising ferroelectric family LnBXO5 (Ln-La, Pr; X-Ge, Si)

B. A. Strukov; B. V. Mill; Eleva L. Belokoneva; S. Yu. Stefanovich; V. N. Sigaev; Yoshiaki Uesu

doi:10.1117/12.266530

4 February 1997 Optical nonlinear properties and structural phase transitions in a new promising ferroelectric family LnBXO₅ (Ln-La, Pr; X-Ge, Si)

B. A. Strukov, B. V. Mill, Eleva L. Belokoneva, S. Yu. Stefanovich, V. N. Sigaev, Yoshiaki Uesu

Author Affiliations +

Proceedings Volume 2967, Optical Inorganic Dielectric Materials and Devices; (1997) https://doi.org/10.1117/12.266530
Event: International Conference on Advanced Optical Materials and Devices, 1996, Riga, Latvia

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.

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B. A. Strukov, B. V. Mill, Eleva L. Belokoneva, S. Yu. Stefanovich, V. N. Sigaev, and Yoshiaki Uesu "Optical nonlinear properties and structural phase transitions in a new promising ferroelectric family LnBXO₅ (Ln-La, Pr; X-Ge, Si)", Proc. SPIE 2967, Optical Inorganic Dielectric Materials and Devices, (4 February 1997); https://doi.org/10.1117/12.266530

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