Phase Transition of BiFe1-xAlxO3 Films Prepared by Chemical Solution Deposition

Abstract

BiFe 1-x Al x O 3 thin films with rhombohedral (R3c), monoclinic (Cm) and tetragonal (T)-like symmetry were obtained by the chemical solution deposition (CSD) and rapid thermal annealing (RTA). The T-like phase is formed under high temperature and high Al concentration. While the Cm phase is stable in the region of low temperature and high Al concentration. The phase transition is suggested to be arisen from strain induced in the film formation.

Comparative density functional studies of BiMO3 polymorphs (M = Al, Ga, In) based on LDA, GGA, and meta-GGA functionals

“…BiAl x Fe 1Àx O 3 thin films, where the following three phases were found: rhombohedral R3c, monoclinic Cm, and tetragonal-like one. 27 The theoretical description of oxides by means of density functional theory is a complex and challenging issue. [28][29][30] The results often depend on the choice of exchange-correlation (XC) functionals.…”

“…Another example is BiAl x Fe 1− x O 3 thin films, where the following three phases were found: rhombohedral R 3 c , monoclinic Cm , and tetragonal-like one. 27…”