Enhanced Energy Storage Density of Lead Lutetium Niobate Crystals by Electric Field-Induced Secondary Phase Transition via Na/La Codoping

• DOI: 10.1021/acsami.0c06298
• Publication Date: 2020-06-04T12:34:46Z
• Authors: Xiaoming Yang; Fangping Zhuo; Zujian Wang; Lingfei Lv; Ying Liu; Chao He; Xifa Long
• Keywords: Antiferroelectricity

As emerging materials for capacitor applications, antiferroelectric (AFE) possess high energy storage density. AFE single crystals are conducive to studying the physical mechanism of response. However, preparation is a huge and long-standing challenge. Herein, we report effect Na/La codoping on properties phase transition Pb(Lu1/2Nb1/2)O3 (PLN) crystals. An enhanced recoverable density 4.81 J/cm3 with efficiency 82.36% obtained, which much larger than that PbZrO3- PLN-based Two superlattice reflections, stem from A-site Pb2+ ions ordered B-site ions, identified by X-ray diffraction selected-area electron diffraction. The domain structures demonstrated temperature stability phase. A secondary ferroelectric induced after codoping, resulting in sharp improvement polarization (12.5 μC/cm2), contributes enormous enhancement This multiphase explained using modified Ginzburg-Landau-Devonshire phenomenology.