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Structure and dielectric properties of Bi3−x Nd x Ti1.5W0.5O9 (0.25 ≤ x ≤ 0.5) layered oxides

  • Proceedings of the International Symposium “Order, Disorder, and Properties of Oxides” (ODPO-11)
  • Published:
Bulletin of the Russian Academy of Sciences: Physics Aims and scope

Abstract

A new series of polycrystalline Bi3 − x Nd x Ti1.5W0.5O9 (0.25 ≤ x ≤ 0.5) layered perovskite-like oxides were synthesized as single phases. The analysis of the X-ray powder diffraction data showed that all compounds crystallize in the polar orthorhombic structure of Aurivillius phase type with the space group A2 1 am.The temperature dependences of the dielectric properties of the compounds obtained were investigated in the frequency range from 1 to 1000 kHz. For all compounds the temperature dependences of the relative permittivity ɛ/ɛ0(t) contain high-temperature maxima corresponding to the Curie temperature (t c ). The latter decreased from 630 to 530°C and ɛ/ɛ0(t c ) decreased by a factor of nearly 3 with an increase in the neodymium amount by a factor of 2. The found activation energies E a of charge carriers for all compounds are close (∼0.76 eV) and independent of neodymium amount.

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Authors and Affiliations

  1. Research Institute of Physics, Southern Federal University, Rostov-on-Don, 344090, Russia

    V. G. Vlasenko, A. T. Shuvaev, I. A. Zarubin & E. V. Vlasenko

Authors
  1. V. G. Vlasenko
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  2. A. T. Shuvaev
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  3. I. A. Zarubin
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  4. E. V. Vlasenko
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Corresponding author

Correspondence to V. G. Vlasenko.

Additional information

Original Russian Text © V.G. Vlasenko, A.T. Shuvaev, I.A. Zarubin, E.V. Vlasenko, 2009, published in Izvestiya Rossiiskoi Akademii Nauk. Seriya Fizicheskaya, 2009, Vol. 73, No. 8, pp. 1196–1198.

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Vlasenko, V.G., Shuvaev, A.T., Zarubin, I.A. et al. Structure and dielectric properties of Bi3−x Nd x Ti1.5W0.5O9 (0.25 ≤ x ≤ 0.5) layered oxides. Bull. Russ. Acad. Sci. Phys. 73, 1134–1136 (2009). https://doi.org/10.3103/S1062873809080346

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  • DOI: https://doi.org/10.3103/S1062873809080346

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