Study on the Ferroelectric Polarization of Polar Ordered Perovskites Under Epitaxial Strain]{Study on the Ferroelectric Polarization of Polar Ordered Perovskites under Epitaxial Strain

The study of perovskite oxynitrides (ABO2N) has quickly risen in importance since they represent a new class of materials with the promise for enhanced characteristics and applications in a wide range of fields. Recently, we predicted several stable ferroelectric phases of perovskite oxynitrides using swarm intelligence methods. We studied the polarization properties of the predicted oxynitrides under epitaxial strain using the Berry's phase approach and found high polarization values in excess of the typical polarization found in industrial ferroelectrics. The stability of these materials was also studied under epitaxial strain where it is found that the polarization can be tuned using 2 axis strains. These polar oxynitrides can provide a new avenue for replacing traditional lead based ferroelectric materials commonly found in industry.