论文标题
应变诱导的氧化物多性异质结构中的磁化控制
Strain-induced magnetization control in an oxide multiferroic heterostructure
论文作者
论文摘要
通过使用电场来控制磁性是针对新型Spintronic设备和未来纳米电子学的研究的目标。因此，多性异质结构引起了极大的兴趣。在这里，我们提供了LA0.65SR0.35MNO3（LSMO）薄膜中的过渡的实验证据和支持DFT分析，从而呈稳定的铁磁相，该层是由铁电batio3（BTO）底物的结构和应变性能引起的，可以通过施加外部电场来修改。 X射线磁圆二色性（XMCD）在Mn L边缘上带有同步辐射的测量显示，实际上显示了两个磁性转变作为温度的函数，与BTO底物的结构变化相对应。我们还表明，在室温下在原始条件下缺乏的铁磁剂可以通过在平面外方向上电气切换BTO BTO铁电域来确定。目前的结果证实，可以利用电诱导的应变来控制多氧化物异质结构中的磁性。
Controlling magnetism by using electric fields is a goal of research towards novel spintronic devices and future nano-electronics. For this reason, multiferroic heterostructures attract much interest. Here we provide experimental evidence, and supporting DFT analysis, of a transition in La0.65Sr0.35MnO3 (LSMO) thin film to a stable ferromagnetic phase, that is induced by the structural and strain properties of the ferroelectric BaTiO3 (BTO) substrate, which can be modified by applying external electric fields. X-ray Magnetic Circular Dichroism (XMCD) 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.
