Effect of polarizable lone pair cations on the second-harmonic generation (SHG) properties of noncentrosymmetric (NCS) Bi2-xYxTeO5 (x=0-0.2)
- Authors
- Jo, Hongil; Kim, Yeong Hun; Lee, Dong Woo; Ok, Kang Min
- Issue Date
- Aug-2014
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- DALTON TRANSACTIONS, v.43, no.30, pp 11752 - 11758
- Pages
- 7
- Journal Title
- DALTON TRANSACTIONS
- Volume
- 43
- Number
- 30
- Start Page
- 11752
- End Page
- 11758
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/11922
- DOI
- 10.1039/c4dt01060d
- ISSN
- 1477-9226
1477-9234
- Abstract
- Y3+-doped noncentrosymmetric (NCS) bismuth tellurite materials, Bi2-xYxTeO5 (x = 0, 0.1, and 0.2), have been synthesized through standard solid-state reactions and structurally characterized by powder neutron diffraction. The reported NCS materials crystallize in the orthorhombic space group Abm2 (no. 39), and exhibit pseudo-three-dimensional frameworks that are composed of BiO3, BiO5, and TeO3 polyhedra. Detailed diffraction studies show that the cell volume of Bi2-xYxTeO5 decreases with an increasing amount of Y(3+)on the Bi3+ sites. However, no ordering between Bi3+ and Y3+ was observed. in the Bi2-xYxTeO5, Powder second-harmonic generation (SHG) measurements, using 1064 nm radiation, reveal that Bi2TeO5, Bi1.9Y0.1TeO5, and Bi1.8Y0.2TeO5 exhibit SHG efficiencies of approximately 300, 200, and 60 times that of alpha-SiO2, respectively. The reduction in SHG for Y3+-doped materials is consistent with the lack of net moment originating from polyhedra with a polarizable Bi3+ cation.
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