Abstract The experimental observation and analysis of self-biased magnetoelectric (ME) coupling effect in the layered La0.7Sr0.3MnO3/BaTiO3/La0.7Sr0.3MnO3 (LSMO/BTO/LSMO) multiferroic heterostructure were reported, and the epitaxial layered LSMO/BTO/LSMO heterostructure was grown on (001) oriented LaAlO3 (LAO) single crystal substrate by using pulsed laser deposition technique. The microstructure, ferromagnetic and ferroelectric properties were studied. The exchange bias effect in the LSMO/LAO interface and the compressive strain gradient field in the heterostructure induced by lattice mismatch resulted in a built-in magnetic bias field (Hbias) in the LSMO layer, which provided limited ME coupling effect at zero applied DC bias magnetic field. It may potentially be used to micro-nano devices especially for multiple state memories.

中文翻译：

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层状La 0.7 Sr 0.3 MnO 3 /BaTiO 3 /La 0.7 Sr 0.3 MnO 3 多铁异质结构中的自偏磁电耦合效应

摘要 报道了层状 La0.7Sr0.3MnO3/BaTiO3/La0.7Sr0.3MnO3 (LSMO/BTO/LSMO) 多铁异质结构中自偏磁电 (ME) 耦合效应的实验观察和分析，以及外延层状 LSMO/ BTO/LSMO 异质结构通过使用脉冲激光沉积技术在 (001) 取向的 LaAlO3 (LAO) 单晶衬底上生长。研究了显微结构、铁磁和铁电性能。LSMO/LAO 界面中的交换偏置效应和由晶格失配引起的异质结构中的压应变梯度场导致 LSMO 层中的内置磁偏置场 (Hbias)，这在零施加 DC 时提供有限的 ME 耦合效应偏置磁场。它有可能用于微纳设备，尤其是多状态存储器。