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Reciprocal-space approach to dipolarly coupled magnetic heterostructures

A. Del Giacco1,2,3,*,†, L. Menna4,5,*, M. J. Gross6, O. Wojewoda1,7, V. Levati2, M. Urbánek7, S. Kurdi5, E. Albisetti2, D. Petti2 et al.

C. A. Ross1

  • *These authors equally contribute to the study.
  • †Contact author: andreadg@mit.edu
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Phys. Rev. Applied 26, 044069 – Published 23 October, 2026

DOI: https://doi.org/10.1103/9z24-jjx3

Abstract

We present an analytical framework capable of describing spin-wave dynamics in magnetic heterostructures composed of a pair of exchange-decoupled magnetic layers separated by a nonmagnetic spacer, focusing in particular on garnet-based multilayers. The model captures the formation of collective spin-wave modes, namely symmetric and antisymmetric, arising from dipolar coupling and provides direct access to the dispersion relation of the system and consequent interference phenomena. This formalism establishes a versatile theoretical tool for the predictive design of dipolarly coupled magnonic devices, providing access to their eigenfrequencies and mode shapes.

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Phys. Rev. Applied 26, 044069– Published 23 October, 2026
  • Received 9 May 2026
  • Revised 3 August 2026
  • Accepted 28 September 2026
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

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