Highly (111)-Orientated BiFeO3 Thin Film Deposited on La0.67Sr0.33MnO3 Buffered Pt/TiO2/SiO2/Si (100) Substrate
Highly (111)-Orientated BiFeO3 Thin Film Deposited on La0.67Sr0.33MnO3 Buffered Pt/TiO2/SiO2/Si (100) Substrate
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DOI：
10.1149/2.018202jes
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发表时间：
2012-03
影响因子：
3.9
通讯作者：
Qingqing Ke;Wenlai Lu;Xuelian Huang;John Wang
中科院分区：
文献类型：
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作者：
Qingqing Ke;Wenlai Lu;Xuelian Huang;John Wang
采用离轴射频磁控溅射法在La0.67Sr0.33MnO3（LSMO）缓冲层Pt/TiO 2/SiO2/Si衬底上制备了具有铁电和磁增强性能的BiFeO 3（BFO）多铁性薄膜，获得了高度（111）取向的织构。BFO/LSMO薄膜表现出优异的铁电和介电性能（在1 kHz时，2 Pr ~210.7 {\mu}C/cm 2，2 Ec ~435 kV/cm，{\displaystyle {\delta}~116.8，tan{\delta} ~ 2.7%），以及在300 kV/cm幅值下高达1010次开关循环的长疲劳寿命。磁行为的增强也被观察到与Ms=89.5 emu/cm 3，这在很大程度上是由LSMO的磁性层贡献。BFO/LSMO双层薄膜铁电和铁磁性能的共存使其成为一个有前途的候选系统的应用中的磁电行为是必需的。
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.