Phase Transition from Weak Ferroelectricity to Incipient Ferroelectricity in Li2Sr(Nb1–x Ta x )2O7

• Published in: Chemistry of materials Vol. 32; no. 2; pp. 744 - 750
• Main Authors: Nagai, Takayuki, Mochizuki, Yasuhide, Shirakuni, Hirokazu, Nakano, Akitoshi, Oba, Fumiyasu, Terasaki, Ichiro, Taniguchi, Hiroki
• Format: Journal Article
• Language: English; Japanese
• Published: American Chemical Society 28.01.2020

Pseudo Ruddlesden–Popper-type Li2SrNb2O7 undergoes a phase transition between paraelectric and weak ferroelectric phases at T c (=217 K), whereas Ta-counterpart Li2SrTa2O7 stays paraelectric though its room temperature structure is identical to that of Li2SrNb2O7. In the present study, the ferroelec...