Ferroelectric anomaly of perovskite layer structured Pb2+‐doped Sr2Nb2O7 ceramics. - Liu, Lintao; Chen, Tao; Ouyang, Delai; Yue, Yajun; Yang, Bin; Yan, Haixue; Abrahams, Isaac; Fu, Zhengqian; Liang, Ruihong; Zhou, Zhiyong (Journal of the American Ceramic Society, 2024)