We report on the observation of strain- and magneto-electric coupling in a system consisting of a thin film of ferromagnetic La (1− x ) Sr x MnO 3 (LSMO, x = 0.5 and 0.3) on a ferroelectric BaTiO 3 (BTO) substrate. Pronounced magnetization steps occur at the BTO structural phase transitions. We associate these steps with a strain induced change of the magnetic anisotropy. Temperature dependent magneto-electric coupling could be evidenced by the magnetic response to an applied AC electric field in all ferroelectric phases of the BTO substrate. In a DC electric field, the magnetization changes are asymmetric with respect to the polarity. Polarized neutron reflectometry hints to oxygen migration as possible mechanism for this asymmetry. It also reveals strain-induced magnetization changes throughout most of the thickness of 252 Å ( x = 0.5) and 360 Å ( x = 0.3), respectively, of the LSMO layer. We conclude that ...

中文翻译：

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BaTiO 3铁电体上La（1-- x）Sr x MnO 3薄膜中磁性的应变和电场控制

我们报告了在由铁电BaTiO 3（BTO）上的铁磁La（1- x）Sr x MnO 3（LSMO，x = 0.5和0.3）薄膜组成的系统中观察到的应变和磁电耦合基质。明显的磁化步骤发生在BTO结构相变处。我们将这些步骤与应变引起的磁各向异性变化联系起来。取决于温度的磁电耦合可以通过在BTO基板的所有铁电相中对施加的AC电场的磁响应来证明。在直流电场中，磁化变化相对于极性是不对称的。极化中子反射法提示氧迁移是这种不对称性的可能机制。它还揭示了在252Å（x = 0。分别为5）和360Å（x = 0.3）。我们得出的结论是...