A New Type of the Ferroelectric Phase Transition

✍ Scribed by J. Holakovský

• Publisher: John Wiley and Sons
• Year: 1973
• Tongue: English
• Weight: 299 KB
• Volume: 56
• Category: Article
• ISSN: 0370-1972
• DOI: 10.1002/pssb.2220560224

✦ Synopsis

Abstract

It, is suggested that a ferroelectric phase transition could be triggered by an instability of the crystal with respect to another phase transition parameter η. The spontaneous polarization P and spontaneous η may occur either successively or simultaneously (at the same temperature), the latter case being always a first order phase transition. The necessary condition for the existence of a triggered ferroelectric phase transition (TFT) is that η^2^ P^2^ is the lowest order interaction term in the free energy expansion. The symmetry change due to TFT is discussed.