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We demonstrate the electrical detection of magnon-magnon hybrid dynamics inyttrium iron garnet/permalloy (YIG/Py) thin film bilayer devices. Directmicrowave current injection through the conductive Py layer excites the hybriddynamics 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 twohybrid modes, with Py or YIG dominated excitations, can be detected via thespin rectification signals from the conductive Py layer, providing phaseresolution of the coupled dynamics. The phase characterization is also appliedto a nonlocally excited Py device, revealing the additional phase shift due tothe perpendicular Oersted field. Our results provide a device platform forexploring hybrid magnonic dynamics and probing their phases, which are crucialfor implementing coherent information processing with magnon excitations

Phase-resolved electrical detection of coherently coupled magnonic devices