Controlling magnetism by using electric fields is a goal of research towards novel spintronic devices and future nanoelectronics. For this reason, multiferroic heterostructures attract much interest. Here we provide experimental evidence, and supporting density functional theory analysis, of a transition in $\mathrm{L}{\mathrm{a}}_{0.65}\mathrm{S}{\mathrm{r}}_{0.35}\mathrm{Mn}{\mathrm{O}}_3$ thin film to a stable ferromagnetic phase, that is induced by the structural and strain properties of the ferroelectric $\mathrm{BaTi}{\mathrm{O}}_3$ (BTO) substrate, which can be modified by applying external electric fields. X-ray magnetic circular dichroism measurements on Mn $L$ edges with a synchrotron radiation show, in fact, two magnetic transitions as a function of temperature that correspond to structural changes of the BTO substrate. We also show that ferromagnetism, absent in the pristine condition at room temperature, can be established by electrically switching the BTO ferroelectric domains in the out-of-plane direction. The present results confirm that electrically induced strain can be exploited to control magnetism in multiferroic oxide heterostructures.

中文翻译：

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氧化物多铁异质结构中的应变感应磁化控制

通过使用电场控制磁性是对新型自旋电子器件和未来纳米电子学的研究目标。因此，多铁性异质结构引起了人们的极大兴趣。在这里，我们提供实验证据，并支持密度泛函理论分析，$\mathrm{大号}{\mathrm{一个}}_{0.65}\mathrm{小号}{\mathrm{[R}}_{0.35}锰{\mathrm{Ø}}_3$ 薄膜形成稳定的铁磁相，这是由铁电体的结构和应变特性引起的 $\mathrm{钡钛}{\mathrm{Ø}}_3$（BTO）基板，可以通过施加外部电场对其进行修改。Mn的X射线磁性圆二色性测量$\mathrm{大号}$实际上，具有同步加速器辐射的边缘显示出两个磁性跃迁，它们是温度的函数，对应于BTO基板的结构变化。我们还显示，可以通过在面外方向上电切换BTO铁电畴来建立室温下原始状态下不存在的铁磁性。目前的结果证实，可以利用电感应应变来控制多铁氧化物异质结构中的磁性。