Local Magnetoelectric Effect in La-Doped BiFeO Multiferroic Thin Films Revealed by Magnetic-Field-Assisted Scanning Probe Microscopy. - Pan, Dan-Feng; Zhou, Ming-Xiu; Lu, Zeng-Xing; Zhang, Hao; Liu, Jun-Ming; Wang, Guang-Hou; Wan, Jian-Guo (Nanoscale Research Letters, 2016)