Excellent low-field energy storage properties and high density achieved in Bi0.48Na0.48Ba0.04TiO3-based oxide ceramics via interposing (Na0.97Bi0.01)+/Ta5+ at A/B sites

Local phase coexistence was constructed under the synergistic effect of vacancy defect and large band gap element doping, which causes low hysteresis with excellent high energy density at low electric fields (LEFs).