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Elastic properties of lead-free (Na1/2Bi1/2)TiO3-BaTiO3 single crystals near the morphotropic phase boundary as studied by using Brillouin spectroscopy

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Abstract

The elastic properties of lead-free (Na1/2Bi1/2)TiO3-BaTiO3 single crystals near the morphotropic phase boundary were investigated by using Brillouin spectroscopy at room temperature. The measured longitudinal elastic constants of unpoled single crystals with a BaTiO3 content of 5% exhibited large changes depending on the scattering geometry, indicating that a substantial acoustic dispersion effect exists in this system. This was attributed to the relaxor nature due to inherent disorder in the A-site of the perovskite structure.

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Authors and Affiliations

  1. Department of Physics, Hallym University, Chuncheon, 200-702, Korea

    Byoung Wan Lee & Jae-Hyeon Ko

  2. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 201800, China

    Xiaobing Li & Haosu Luo

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  1. Byoung Wan Lee
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  2. Jae-Hyeon Ko
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  3. Xiaobing Li
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  4. Haosu Luo
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Correspondence to Jae-Hyeon Ko.

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Lee, B.W., Ko, JH., Li, X. et al. Elastic properties of lead-free (Na1/2Bi1/2)TiO3-BaTiO3 single crystals near the morphotropic phase boundary as studied by using Brillouin spectroscopy. Journal of the Korean Physical Society 66, 1350–1354 (2015). https://doi.org/10.3938/jkps.66.1350

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  • DOI: https://doi.org/10.3938/jkps.66.1350

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