论文标题
铁磁异质结构中的镁杂交
Magnon hybridization in ferrimagnetic heterostructures
论文作者
论文摘要
我们研究了由超薄的gadolinium铁石榴石和Yttrium铁石榴石层组成的铁磁性异质结构中的镁杂交，并显示了具有不同极化的镁质模式的局部和扩展的空间曲线。在整个异质结构的温度梯度存在下，这些模式有望具有不同的热激发特性。从对其对纵向自旋seebeck效应的后果进行定量分析，我们预测，相对于先前在Gadolinium Iron Garnet中观察到的温度相对于先前观察到的温度可观察到的变化。此外，发现旋转Seebeck信号的签名点可以通过YIG厚度调谐。我们的结果表明需要考虑到铁磁异质结构中磁杆模式之间的温度差。
We study magnon hybridization in a ferrimagnetic heterostructure consisting of ultrathin gadolinium iron garnet and yttrium iron garnet layers and show the localized and extended spatial profiles of the magnon modes with different polarizations. These modes are expected to have distinct thermal excitation properties in the presence of a temperature gradient across the heterostructure. From a quantitative analysis of their consequences on longitudinal spin Seebeck effect, we predict an observable shift of the sign-changing temperature with respect to the one previously observed in gadolinium iron garnet. Moreover, the sign-changing point of spin Seebeck signal is found to be tunable by YIG thickness. Our results suggest the necessity of taking into account the temperature difference between the magnon modes in ferrimagnetic heterostructures.
