Enhanced polarization properties of ferrielectric AgNbO3 single crystals grown by Czochralski method under high-pressure oxygen atmosphere

We report crystal growth under high oxygen pressure (P O2) atmosphere that yields high-quality single crystals of AgNbO3. X-ray fluorescence analysis reveals that an increase in P O2 during crystal growth effectively suppresses the deficiency of Ag and then leads to low leakage currents. Single crystals grown via the Czochralski method at a P O2 of 0.9 MPa are demonstrated to show ferrielectric switching with enhanced polarization under electric fields along the [110] direction.