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Raman scattering study of La-, Nd- and Sm-substituted Bi4Ti3O12

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Abstract

Raman modes of bismuth-layered perovskite Bi4-xLaxTi3O12 ceramic samples were studied as a function of La content from x=0.00 to 0.75. In the low-wavenumber region (35∼150 cm-1), the rigid mode was found to be insensitive to La substitution, while the compositional change caused a frequency upshift of one of the soft modes. In the high-wavenumber region, the results indicated that a structure transition from orthorhombic to tetragonal may occur above x=0.75, since the B2g and B3g modes showed evidence of coalescence into Eg modes with increasing La content. Raman spectra of Bi3.25Nd0.75Ti3O12 and Bi3.25Sm0.75Ti3O12 are presented and compared with Bi4-xLaxTi3O12.

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Authors and Affiliations

  1. National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering, Nanjing University, Nanjing, 210093, China

    D. Wu & A.D. Li

  2. Department of Applied Physics, the Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China

    D. Wu, C.L. Mak & K.H. Wong

  3. National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China

    Y. Deng & N.B. Ming

  4. National Laboratory of Solid State Microstructures and Center for Materials Analysis, Nanjing University, Nanjing, 210093, China

    M.S. Zhang

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  1. D. Wu
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  2. Y. Deng
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  3. C.L. Mak
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  4. K.H. Wong
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  5. A.D. Li
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  6. M.S. Zhang
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  7. N.B. Ming
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Correspondence to D. Wu.

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PACS

78.30.-j: 63.20.-e; 77.80.Bh; 77.84.Dy

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Wu, D., Deng, Y., Mak, C. et al. Raman scattering study of La-, Nd- and Sm-substituted Bi4Ti3O12. Appl. Phys. A 80, 607–610 (2005). https://doi.org/10.1007/s00339-003-2244-z

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  • DOI: https://doi.org/10.1007/s00339-003-2244-z

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