4:00 PM - 4:15 PM [16p-411-1] [JSAP Young Scientist Award Speech] Quantitative Analysis of Direct Piezoresponse for BiFeO3 Films by Scanning Probe Microscopy 〇Kento Kariya1, Takeshi Yoshimura1, Norifumi Fujimura1 (1.Osaka Pref. Univ.)