Electric field induced nanoscale polarization switching and piezoresponse in Sm and Mn co-doped BiFeO3 multiferroic ceramics by using piezoresponse force microscopy. - Anthoniappen, J.; Chang, Wei Sea; Soh, Ai Kah; Tu, Chi-Shun; Vashan, P.; Lim, Fang Sheng (Acta Materialia, 2017)