Li Yi, Zhao Chenbo, Amin Vivek P, Zhang Zhizhi, Vogel Michael, Xiong Yuzan, Sklenar Joseph, Divan Ralu, Pearson John, Stiles Mark D, Zhang Wei, Hoffmann Axel, Novosad Valentine
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA†.
Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA.
Appl Phys Lett. 2021;118. doi: 10.1063/5.0042784.
We demonstrate the electrical detection of magnon-magnon hybrid dynamics in yttrium iron garnet/permalloy (YIG/Py) thin film bilayer devices. Direct microwave current injection through the conductive Py layer excites the hybrid dynamics consisting of the uniform mode of Py and the first standing spin wave ( = 1) mode of YIG, which are coupled via interfacial exchange. Both the two hybrid modes, with Py or YIG dominated excitations, can be detected via the spin rectification signals from the conductive Py layer, providing phase resolution of the coupled dynamics. The phase characterization is also applied to a nonlocally excited Py device, revealing the additional phase shift due to the perpendicular Oersted field. Our results provide a device platform for exploring hybrid magnonic dynamics and probing their phases, which are crucial for implementing coherent information processing with magnon excitations.
我们展示了在钇铁石榴石/坡莫合金（YIG/Py）薄膜双层器件中对磁振子-磁振子混合动力学的电学检测。通过导电的Py层直接注入微波电流会激发由Py的均匀模式和YIG的首个驻波自旋波（= 1）模式组成的混合动力学，它们通过界面交换相互耦合。这两种混合模式，无论是以Py为主导的激发还是以YIG为主导的激发，都可以通过来自导电Py层的自旋整流信号进行检测，从而提供耦合动力学的相位分辨率。相位表征还应用于非局部激发的Py器件，揭示了由于垂直奥斯特场引起的附加相移。我们的结果提供了一个用于探索混合磁振子动力学及其相位的器件平台，这对于利用磁振子激发实现相干信息处理至关重要。
