Simple:
* Strontium titanate
* Calcium titanate
* Lead titanate
* Bismuth ferrite
* Lanthanum ytterbium oxide
* Silicate perovskite
* Lanthanum manganite
* Yttrium aluminum perovskite (YAP)
* Lutetium aluminum perovskite (LuAP)
Solid solutions:
* Lanthanum strontium manganite
* LSAT (lanthanum aluminate – strontium aluminum tantalate)
* Lead scandium tantalate
* Lead zirconate titanate
* Methylammonium lead halide
* Methylammonium tin halide
* Formamidinium tin halide