%0 Journal Article
%A Kolokoltsev, Oleg
%A Fragoso-Mora, José R.
%A Matatagui Cruz, Daniel
%A Gómez-Arista, Iván
%A Mejia-Uriarte, Elsi
%A Qureshi, Naser
%T Phase jumps in coupled magnonic waveguides
%D 2024
%@ 0304-8853
%U https://hdl.handle.net/20.500.14352/134808
%X In this work we present an experimental study of the phase characteristics of magnetostatic quasi-surface waves (MQSW) in a tangentially magnetized yttrium iron garnet (YIG) thin film bilayer. The phase of MQSWs was measured as a function of air gap (g) between two magnonic waveguides. It is shown that the energy exchange between two YIG layers is accompanied by relatively sharp π-radian phase jumps of MQSWs, at specific values of g. The effect was studied at large wavelengths of the MQSWs, and at a propagation distance of 1 cm. The theory predicts that the slope of the phase shift (∂φ/∂g) at submicrometric values of g can be of the order of a few degrees per nm.
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