Diffuse first-order phase transition in NaNbO$_3$:Gd (a report)

I. P. Raevski; S. I. Raevskaya; S. A. Prosandeev; V. A. Shuvaeva; A. M. Glazer; M. S. Prosandeeva

Diffuse first-order phase transition in NaNbO$_3$:Gd (a report)

Materials Science 2007-05-23 v1

Authors: I. P. Raevski , S. I. Raevskaya , S. A. Prosandeev , V. A. Shuvaeva , A. M. Glazer , M. S. Prosandeeva

Abstract

Dielectric permittivity measurements show that (1-x)NaNbO3-(x)Gd1/3NbO3 crystals, at $x=0.09$ , exhibit a first order phase transition near 150 C which is diffuse over a wide temperature interval. The area of the \epsilon(T) thermal hysteresis loop was found to depend both on the annealing and cooling temperatures. Optical studies in polarized light show the decrease of the domains sizes at this phase transition. The results obtained are fitted assuming the space distribution of Curie temperatures.

Keywords

crystal growth and phase transitions ferroelectric phase transition

Cite

@article{arxiv.cond-mat/0401040,
  title  = {Diffuse first-order phase transition in NaNbO$_3$:Gd (a report)},
  author = {I. P. Raevski and S. I. Raevskaya and S. A. Prosandeev and V. A. Shuvaeva and A. M. Glazer and M. S. Prosandeeva},
  journal= {arXiv preprint arXiv:cond-mat/0401040},
  year   = {2007}
}

Comments

2 pages, 3 figures, Fundamental Physics of Ferroelectrics, Williamsburg 2004

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