Phase-resolved electrical detection of coherently coupled magnonic devices

TL;DR

This paper demonstrates phase-resolved electrical detection of hybrid magnonic dynamics in YIG/Py bilayer devices, enabling exploration of coherent magnonic interactions for potential information processing applications.

Contribution

It introduces a method for phase-resolved electrical detection of coupled magnon modes in YIG/Py devices, advancing the understanding of hybrid magnonic dynamics.

Findings

Successful detection of hybrid magnon modes via spin rectification signals.

Phase shifts observed due to perpendicular Oersted fields.

Platform established for coherent magnonic information processing.

Abstract

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 ($n=1$) 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