Because of its broad range of functional applications,numerous kinds of perovskite-structured ceramics have been widely studied. However, the properties of barium iron tantalate, Ba(Fe1/2Ta1/2)O3 (BFT),which has a perovskite structure is not well known and only few studies have been performed. In the late 1950s, Galasso et al. [1] reported that the crystal structure of BFT is cubic perovskite and the lattice parameter is about a = 4.056A ° .An interesting phenomenon quoted in the paper is that the BFT showed
ferroelectric properties even though it has a cubic perovskite structure. On the other hand, an ambiguous
dielectric characteristic of BFT was reported by Agranovskaya
[2] representing only a large dielectric loss
tangent above 1 with no further explanation. Later,
more detail crystal structure analyses in BFT showed
that it had a cubic symmetry that can not possess
ferroelectric properties.