Physics – Condensed Matter – Materials Science
Scientific paper
2012-03-02
Journal of The Electrochemical Society, 159 (2) G11-G14 (2012)
Physics
Condensed Matter
Materials Science
Scientific paper
10.1149/2.018202jes
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.
Huang Xuelian
Ke Qingqing
Lu Wenlai
Wang John
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