论文标题
解散锰岩外延异质结构的磁化kerr效应
Disentangling the magneto-optic Kerr effect of manganite epitaxial heterostructures
论文作者
论文摘要
磁化kerr效应可以探测铁磁性薄膜中磁化逆转的过程，从而用作磁力测定法的替代方法。 Kerr效应是波长依赖性的，Kerr旋转可以逆转符号，在特定波长下消失。我们研究了铁磁锰矿的外延异质结构，la $ _ {0.7} $ sr $ _ {0.3} $ Mn $ _ {0.9} $ _ {0.1} $ ru $ _ {0.1} $ $ $ $ $ _3 $，通过Polar kerr效应和磁态。锰层通过一层镍，ndnio $ _3 $分开或连接。当用400 nm波长测量时，具有不同厚度不同的厚度不同的三层型型型木岩层的Kerr旋转磁滞回路具有引人入胜的Humplike特征。通过研究其他参考样本，我们将单个层对环的贡献取消：我们表明驼峰来自两个不同铁磁层的Kerr旋转的相反含义，结合了Kerr信号的附加行为。
Magneto-optic Kerr effect can probe the process of magnetization reversal in ferromagnetic thin films and thus be used as an alternative to magnetometry. Kerr effect is wavelength-dependent and the Kerr rotation can reverse sign, vanishing at particular wavelengths. We investigate epitaxial heterostructures of ferromagnetic manganite, La$_{0.7}$Sr$_{0.3}$Mn$_{0.9}$Ru$_{0.1}$O$_3$, by polar Kerr effect and magnetometry. The manganite layers are separated by or interfaced with a layer of nickelate, NdNiO$_3$. Kerr rotation hysteresis loops of trilayers, with two manganite layers of different thickness separated by a nickelate layer, have intriguing humplike features, when measured with light of 400 nm wavelength. By investigating additional reference samples we disentangle the contributions of the individual layers to the loops: we show that the humps originate from the opposite sense of the Kerr rotation of the two different ferromagnetic layers, combined with the additive behavior of the Kerr signal.
