Effect of heterogeneous interface on the microwave dielectric properties of Ca(Mg1/3Nb2/3)O3/CaTiO3 thin films

► Effect of heterogeneous interface on the microwave dielectric properties was studied. ► The CMN/CT films were uniform, smooth and dense. ► The CMN/CT films have single perovskite phase regardless of interface number. ► The depletion layers were formed between CMN and CT films. ► The dielectric properties of films were improved with adding heterogeneous interfaces.