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Evidence of low-symmetry phases in pressure-dependent Raman spectroscopic study of BaTiO3

  • Ceramics
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Abstract

In the earlier pressure-dependent Raman spectroscopic studies, it has been reported that BaTiO3 undergoes a tetragonal to cubic phase transition above ~ 2 GPa, whereas pressure-dependent X-ray absorption, X-ray diffuse scattering studies and pair distribution function studies have reported the presence of a low-symmetry rhombohedral phase above ~ 2.3 GPa. In this report, we present our pressure-dependent Raman spectroscopic studies on polycrystalline BaTiO3 which shows that it first undergoes a transition from tetragonal to orthorhombic/rhombohedral phase above ~ 2.6 GPa and then finally goes to the cubic phase above 8.4 GPa. Pressure-dependent synchrotron X-ray diffraction (SXRD) studies have also been carried out that provided rate of change of volume as a function of pressure resulting in bulk modulus of 215 ± 9 GPa.

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Acknowledgements

Authors thank Dr. D.M. Phase and Mr. Gyanendra Panchal for FESEM measurements.

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Authors and Affiliations

  1. UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore, 452001, India

    Shekhar Tyagi, V. G. Sathe & Gaurav Sharma

  2. High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Mumbai, 400085, India

    Velaga Srihari & Himanshu Kumar Poswal

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  1. Shekhar Tyagi
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  2. V. G. Sathe
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  3. Gaurav Sharma
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  4. Velaga Srihari
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  5. Himanshu Kumar Poswal
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Correspondence to Shekhar Tyagi.

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Tyagi, S., Sathe, V.G., Sharma, G. et al. Evidence of low-symmetry phases in pressure-dependent Raman spectroscopic study of BaTiO3. J Mater Sci 53, 7224–7232 (2018). https://doi.org/10.1007/s10853-018-2102-1

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  • DOI: https://doi.org/10.1007/s10853-018-2102-1

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