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Research Group Nanoscaled Magnonic Hybrids

Spin waves, the elementary low energy excitations of an ordered spin system, and their bosonic quanta, magnons, carry energy and angular momentum in the form of spin. The field of magnonics aims to create devices for sensing, data processing and logic which are based on spin waves and their outstanding properties like intrinsic nonlinearity and nanometer wavelengths at GHz frequencies.

Our scientific aim is to explore and combine emerging physical phenomena which can be used to realise novel magnonic hybrid systems with novel and superior characteristics. We have a particular focus on:

  • Nonlinear spin-wave phenomena in micro- and nanostructures
  • Nanoscaled magnonic devices for unconventional data processing
  • Novel materials for magnonics including low-damping Heuler compounds
  • Hybrid systems combining magnonics with spintronic and phononic systems
  • Amplification and control of coherent spin-waves in micro-and nanostructures using parametric processes
  • Nonreciprocal magnonic systems based on dipole-dipole and DMI interactions

To achieve our goals, we investigate magnonics systems experimentally by Brillouin light scattering spectroscopy and inductive techniques. To study and optimize magnonic systems before fabrication, we employ massively parallelized micromagnetic simulations. These simulations are run and analysed by our home-made AITHERICON software platform with the aim to use artificial intelligence, neural networks and inverse design methods to create magnonic systems with designed and superior properties for wave-based transport and data processing.

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Internship of Nicolas Fermon
From Mach to July 2023, we had the pleasure to host Nicolas Fermon from Ecole National Supérieure (ENS) Paris-Saclay for his internship. As part of Anna Friedel’s work on highly polarized Heusler alloys, Nicolas studied their magneto-optical properties. He was…
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SELECTED RECENT PUBLICATIONS AND ACCEPTED SUBMISSIONS

Link to FULL PUBLICATION LIST

    2026

  1. Spin-wave phase modulation using magnetic domain walls in dipolarly coupled structures for non-volatile magnonic computation
    H. Mortada, P. Pirro, A. Hamadeh
    Appl. Phys. Lett. 128, 232401 (2026)
    arXiv.2606.03336
    • Magnonics
    • Spin-wave computing
    • Simulation

  2. Spin-polarization of the electric current in half-metallic Co2MnSi Heusler thin films
    José Solano Córdova, Anna Maria Friedel, Quentin Rossi, Jérôme Robert, Yves Henry, Philipp Pirro, Sébastien Petit-Watelot, Stéphane Andrieu, Matthieu Bailleul
    arXiv.2606.04598
    • Heusler
    • Magnonics
    • Nanostructures
    • Microwave

  3. Epitaxial Co2MnSi with intrinsic magnetocrystalline anisotropy as a route to bias-field-free nonlinear half-metal magnonics at the nanoscale
    Anna Maria Friedel, Jaafar Ghanbaja, Björn Heinz, Moritz Bechberger, Sylvie Migot, Sébastien Petit-Watelot, Stéphane Andrieu, Philipp Pirro
    arXiv.2606.03431
    • FMR
    • Magnon Instability
    • Magnonics
    • Nanostructures
    • Nonlinear process
    • Pre-prints
    • Spin waves
    • Co2MnSi
    • Anisotropy
    • Half-metal magnonics
    • Heusler
    • Nanofabrication

  4. Phase-dependent parametric amplification of propagating spin waves in YIG nanostructures enabled by local inhomogeneities
    Akira Lentfert, Ephraim Spindler, Björn Heinz, Mathias Weiler, Philipp Pirro
    2606.02139
    • BLS
    • Magnonics
    • Micromagnetism
    • Nanostructures
    • Parametric Pumping
    • Pre-prints
    • Spin waves

  5. Nonlinear frequency shift and bistability of magnon-polarons
    Kevin Künstle, Matthias Wagner, Philipp Knaus, Yannik Kunz, Ephraim Spindler, Katharina Lasinger, Matthias R. Schweizer, Philipp Pirro, John F. Gregg, Mathias Weiler
    arXiv.2605.22157
    • Nonlinear process
    • Surface Acoustic Waves (SAW)
    • YIG
    • Magneto-elastic interaction