TY - JOUR KW - Transmission electron microscopy KW - Crystal structure KW - Polarization KW - Bismuth compounds KW - Ferroelectricity KW - Ferroelectric films KW - Piezoforce microscopy KW - Epitaxial films KW - Ferroelectric size effects KW - Monoclinic phases AU - Y.H Chu AU - T Zhao AU - M.P Cruz AU - Q Zhan AU - P.L Yang AU - L.W Martin AU - M Huijben AU - C.H Yang AU - F Zavaliche AU - H Zheng AU - Ramamoorthy Ramesh AB - Ferroelectric size effects in multiferroic BiFeO3 have been studied using a host of complementary measurements. The structure of such epitaxial films has been investigated using atomic force microscopy, transmission electron microscopy, and x-ray diffraction. The crystal structure of the films has been identified as a monoclinic phase, which suggests that the polarization direction is close to (111). Such behavior has also been confirmed by piezoforce microscopy measurements. That also reveals that the ferroelectricity is down to at least 2 nm.©2007 American Institute of Physics. BT - Applied Physics Letters DO - 10.1063/1.2750524 LA - eng M1 - 25 N1 - cited By 150 N2 - Ferroelectric size effects in multiferroic BiFeO3 have been studied using a host of complementary measurements. The structure of such epitaxial films has been investigated using atomic force microscopy, transmission electron microscopy, and x-ray diffraction. The crystal structure of the films has been identified as a monoclinic phase, which suggests that the polarization direction is close to (111). Such behavior has also been confirmed by piezoforce microscopy measurements. That also reveals that the ferroelectricity is down to at least 2 nm.©2007 American Institute of Physics. PY - 2007 T2 - Applied Physics Letters TI - Ferroelectric size effects in multiferroic BiFeO3 thin films VL - 90 SN - 00036951 ER -