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Electric field induced phase transition in first order ferroelectrics with large zero point energy

Author

Listed:
  • Wang, C.L.
  • Li, J.C.
  • Zhao, M.L.
  • Zhang, J.L.
  • Zhong, W.L.
  • Aragó, C.
  • Marqués, M.I.
  • Gonzalo, J.A.

Abstract

An electric field induced phase transition in first order ferroelectrics with very large zero point energy is studied on the framework of the effective field approach. It is well known that when the zero point energy of a system is relatively large, the ferroelectric behaviour is depressed and no phase transition can be observed. The critical value Ωcf of zero point energy for whom the phase transition disappears turns out to be dependant on the order of transition. For zero point energies larger than this critical value, a phase transition may be induced applying an external electric field. This temperature dependence of the induced polarization shows a discontinuous step when the applied electric field is weak, but becoming a continuous one at a strong applied electric field. Another critical value of zero point energy Ωcp>Ωcf is deduced for which no phase transition at all can be attained.

Suggested Citation

  • Wang, C.L. & Li, J.C. & Zhao, M.L. & Zhang, J.L. & Zhong, W.L. & Aragó, C. & Marqués, M.I. & Gonzalo, J.A., 2008. "Electric field induced phase transition in first order ferroelectrics with large zero point energy," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 387(1), pages 115-122.
    • Handle: RePEc:eee:phsmap:v:387:y:2008:i:1:p:115-122
    DOI: 10.1016/j.physa.2007.08.033
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