Enhanced fatigue resistance and lattice dynamics induced by the strong local strain in Fe-doped KTa1−xNbxO3 single crystals

Fe-doping gives rise to the strong local distributions of strain fields and the enhanced recoverability of the lattice vibration, which is fundamentally responsible for the promotion of electro-strain and fatigue resistance in Fe-doped KTa 1− x Nb x O 3 .