Magnetoelectric effects in bilayers and multilayers of magnetostrictive and piezoelectric perovskite oxides
Magnetoelectric effects in bilayers and multilayers of magnetostrictive and piezoelectric perovskite oxides
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DOI：
10.1103/physrevb.65.134402
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发表时间：
2002-03
影响因子：
3.7
通讯作者：
G. Srinivasan;E. T. Rasmussen;B. J. Levin;R. Hayes
中科院分区：
文献类型：
--
作者：
G. Srinivasan;E. T. Rasmussen;B. J. Levin;R. Hayes
报道了铁磁性氧化镧和压电钛酸铅(PZT)的层状复合材料中观察到的强磁电效应。研究了La0的厚膜结构。7sr 0。3MnO_3(LSMO)-PZT和La_0。7钙0。3MnO_3(LCMO)-PZT。测量了流延法制备的双层膜和多层膜的低频磁电电压系数αE。这种效应在LSMO-PZT中比在LCMO-PZT中更强，在多层膜中比在双层膜中弱。对于横向ME效应，测得最大αE为60 mV/cm Oe，比纵向效应高2~3倍。αE的偏置磁场依赖关系表现为磁滞和剩磁。随着频率的升高或温度的降低，αE普遍增大。对于αE的磁场依赖关系，理论和数据有很好的定性一致性。
The observation of strong magnetoelectric effects is reported in layered composites of ferromagnetic lanthanum manganites and piezoelectric lead zirconate titanate (PZT). Studies were made on thick-film structures of La 0 . 7 Sr 0 . 3 MnO 3 (LSMO)-PZT and La 0 . 7 Ca 0 . 3 MnO 3 (LCMO)-PZT. The low-frequency magnetoelectric (ME) voltage coefficient α E was measured in bilayers and multilayers synthesized by tape casting. The effect is stronger in LSMO-PZT than in LCMO-PZT, and is weaker in multilayers compared to bilayers. A maximum α E of 60 mV/cm Oe is measured for the transverse ME effect and is a factor of 2 to 3 higher than the longitudinal effect. The bias magnetic-field dependence of α E shows hysteresis and remanence. A general increase in α E is observed with increasing frequency or decreasing temperature. There is good qualitative agreement between theory and data for the magnetic-field dependence of α E .