Ferroelectric Instability and Dimensionality in Bi-Layered Perovskites and Thin Films

Table 3

Estimated dipole moment of TaO₆ octahedron of the ferroelectric phase at 300 K (A2₁am) and the high-temperature paraelectric phase (I4/mmm) at 1000 K [25].

A21am					I4/mmm
	Present study	Miura [34]	Shimakawa et al. [35]	Rae et al. [36]	Present study
𝑝𝑥	0.035	0.564	0.425	0.386	0
𝑝𝑦	−0.702	−0.074	0.001	0.003	0
𝑝𝑧	1.528	1.747	1.169	1.117	1.365
𝑝	1.682	1.837	1.244	1.182	1.365