Kolokoltsev, OlegFragoso-Mora, José R.Matatagui Cruz, DanielGómez-Arista, IvánMejia-Uriarte, ElsiQureshi, Naser2026-04-152026-04-152024-07-15Kolokoltsev, O., Fragoso-Mora, J. R., Matatagui, D., Gómez-Arista, I., Mejia-Uriarte, E., & Qureshi, N. (2024). Phase jumps in coupled magnonic waveguides. Journal of Magnetism and Magnetic Materials, 606, 172386.0304-885310.1016/J.JMMM.2024.172386https://hdl.handle.net/20.500.14352/134808©2024 The Author(s). RYC2021-031166-IIn 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.engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/journal article1873-4766https://doi.org/10.1016/j.jmmm.2024.172386https://www.sciencedirect.com/science/article/pii/S0304885324006772open access538.9Magnetostatic surface wavesSpin wavesPropagationEnvelopeModesFísica de materiales2211 Física del Estado Sólido