  Multiferroic BiFeO3 (BFO) thin film exhibiting desired ferroelectric and
enhanced magnetic properties was grown on La0.67Sr0.33MnO3 (LSMO) buffered
Pt/TiO2/SiO2/Si substrates by off-axis RF magnetic sputtering, where a highly
(111)-oriented texture was obtained. The BFO/LSMO thin film exhibits excellent
ferroelectric and dielectric behaviors (2Pr ~210.7 {\mu}C/cm2, 2Ec~435 kV/cm,
{\epsilon}r ~116.8, and tan{\delta} ~ 2.7% at 1 kHz), together with a long
fatigue endurance up to 1010 switching cycles at amplitude of 300 kV/cm. An
enhancement in magnetic behavior was also observed with Ms=89.5 emu/cm3, which
is largely contributed from the magnetic layer of LSMO. The coexistence of
ferroelectric and ferromagnetic properties in the double layered BFO/LSMO thin
film makes it a promising candidate system for applications where the
magnetoelectric behavior is required.
