[19a-133-1~12] 6.1 Ferroelectric thin films

△ [19a-133-8] Ferroelectric / ferromagnetic domain structure change in B-site substituted BiFeO₃ thin films

〇Marin Katsumata¹, Haruki Shimizu¹, Keisuke Shimizu², Kei Shigematsu¹, Masaki Azuma¹ (1.MSL Tokyo Tech, 2.IIR Tokyo Tech)

Keywords:multiferroic, BiFeO3, PFM, MFM

BiFe_1-xCo_xO₃ thin film is ferromagnetic ferroelectric material at room temperature and expected to show magnetization reversal by electric field. In our previous study, magnetization reversal was observed in a limited area where two of four ferroelectric variants made a stripe pattern. In this study, we prepared BiFe_1-xCo_xO₃ thin film on a miscut substrate to eliminate two kinds of ferroelectric variants. The sample exhibited the stripe ferroelectric domains propagating along to miscut direction. Correlation of ferroelectric/ferromagnetic domains was investigated.