Arbeitsgruppe Prof. Hillebrands

Nano-Magnonics Group

Junior Research Group - Group Leader: Jun.-Prof. Dr. habil. Andrii Chumak

IEEE Promotional Video: Magnetism and Magnetics Technology in the 21st Century


On photo from left to right: Jun.-Prof. Dr. habil. Andrii Chumak (head of the group), Qi Wang (PhD student), Michael Schneider (PhD student), Martin Kewenig (PhD student), Björn Heinz (PhD student), Tobias Fischer (PhD student), Viktor Lauer (PhD student), Dr. Thomas Brächer (co-supervisor).


Aims and scientific goals

A spin wave is a collective excitation of the electron spin system in a magnetic solid. Spin-wave characteristics can be varied by a wide range of parameters which, in combination with a rich choice of linear and non-linear spin-wave properties, renders spin waves excellent objects for the studies of general wave physics. Nowadays, spin waves and their quanta, magnons, are attracting much attention also due to another very ambitious perspective. They are being considered as data carriers in novel computing devices instead of electrons in electronics [Nature Physics 11, 453 (2015)]. The field of science that refers to information transport and processing by spin waves is known as magnonics.


The strategic goal of the Nano-magnonics Group is to make a transformative change in the data processing paradigm from traditional electronics to magnonics. A set of recent groundbreaking physical discoveries in the field of magnonics and spintronics form a solid base for this. Moreover, the recent revolutionary progress in the growth of high-quality nanometer-thick Yttrium-Iron-Garnet (YIG) films, the material with the smallest known magnetic losses in nature, and in the patterning of these films, opened a way to the practical development of nano-scale magnonic computing systems.


The main aims of the Nano-Magnonics Group are:

- Development of magnonic conduits and two dimensional magnonic circuits with lateral sizes below 100 nm made of magnetic insulators and metals.

- Development of the methodology for excitation, manipulation and detection of fast short-wavelength exchange spin waves in these structures.

- Employment of novel spintronics phenomena like Spin Pumping (SP), Spin Transfer Torque (STT), Spin Hall Effect (SHE), Spin Seebeck Effect (SSE) for the excitation, amplification, and detection of spin waves.

- Realization of proof-of-concept prototypes of nano-scaled magnonic logic circuits.




  1. Integrated magnonic half-adder
    Q. Wang, R. Verba, T. Brächer, P. Pirro, A. V. Chumak
  2. Backscattering-Immune Chiral Spin-Wave Modes for Protected Magnon Transport at the Nano-Scale
    M. Mohseni, T. Bracher, Q. Wang, D. A. Bozhko, R. Verba, B. Hillebrands, P. Pirro
  3. Bose-Einstein Condensation of Quasi-Particles by Rapid Cooling
    M. Schneider, T. Brächer, V. Lauer, P. Pirro, D. A. Bozhko, A. A. Serga, H. Yu. Musiienko-Shmarova, B. Heinz, Q. Wang, T. Meyer, F. Heussner, S. Keller, E. Th. Papaioannou, B. Lägel, T. Löber, V. S. Tiberkevich, A. N. Slavin, C. Dubs, B. Hillebrands, and A. V. Chumak

In Press

  1. Spin pinning and spin-wave dispersion in nanoscopic ferromagnetic waveguides
    Q. Wang, B. Heinz, R. Verba, M. Kewenig, P. Pirro, M. Schneider, T. Meyer, B. Lägel, C. Dubs, T. Brächer and and A. V. Chumak
    arXiv:1807.01358 (Accepted by Phys. Rev. Lett.)


  1. The SpinTronicFactory roadmap: a European community view
    B. Dieny, L. Prejbeanu, K. Garello, P. Freitas, R. Lehndorff, W. Raberg, U. Ebels, S. Demokritov, J. Akerman, P. Pirro, C. Adelmann, A. Anane, A. Chumak, A. Hiroata, S. Mangin, M. d’Aquino, G. Prenat, G. Finocchio, L. Lopez Diaz, O. Chubykalo-Fesenko, P. Bortolotti
    SciTech Europa (2019)
  2. Magnon-Fluxon interaction in a ferromagnet/superconductor heterostructure
    O. V. Dobrovolskiy, R. Sachser, T. Brächer, T. Fischer, V. V. Kruglyak, R. V. Vovk, V. A. Shklovskij, M. Huth, B. Hillebrands, and A. V. Chumak
    Nature Physics (2019)
  3. Optical determination of the exchange stiffness constant in an iron garnet
    K. Matsumoto, T. Brächer, P. Pirro, D. Bozhko, T. Fischer, M. Geilen, F. Heussner, T. Meyer, B. Hillebrands, T. Satoh
    Jpn. J. Appl. Phys. 57, 070308 (2018)
  4. An analog magnon adder for all-magnonic neurons
    T. Brächer and P. Pirro
    Editors pick in the special issue New physics and materials for neuromorphic computation
    J. Appl. Phys. 124, 152119 (2018)
  5. Control of spin-wave propagation using magnetisation gradients
    M. Vogel, R. Aßmann, P. Pirro, A. V. Chumak, B. Hillebrands, and G. von Freymann
    Sci. Rep. 8, 11099 (2018)
  6. Reconfigurable nano-scale spin-wave directional coupler
    Q. Wang, P. Pirro, R. Verba, A. Slavin, B. Hillebrands, and A. V. Chumak
    Sci. Adv. 4, e1701517 (2018)
  7. Voltage-controlled nano-scale reconfigurable magnonic crystal
    Q. Wang, A. V. Chumak, L. Jin, H. Zhang, B. Hillebrands, and Z. Zhong
    Phys. Rev. B 95, 134433 (2017)
  8. Experimental prototype of a spin-wave majority gate
    T. Fischer, M. Kewenig, D. A. Bozhko, A. A. Serga, I. I. Syvorotka, F. Ciubotaru, C. Adelmann, B. Hillebrands, and A. V. Chumak
    Appl. Phys. Lett. 110, 152401 (2017)
  9. Temporal evolution of auto-oscillations in a YIG/Pt microdisc driven by pulsed spin Hall effect-induced spin-transfer torque
    V. Lauer, M. Schneider, T. Meyer, T. Braecher, P. Pirro, B. Heinz, F. Heussner, B. Laegel, M. C. Onbasli,
    C. A. Ross, B. Hillebrands, and A. V. Chumak
    IEEE Magn. Lett. 8, 3104304 (2017)

Book chapters and review articles

  1. Magnon spintronics: Fundamentals of magnon-based computing
    A. V. Chumak
    In: Spintronics Handbook: Spin Transport and Magnetism, Second Edition, edited by E. Y. Tsymbal and
    I. Žutić (CRC Press, Boca Raton, Florida), 2018 (submitted)
  2. Parallel pumping for magnon spintronics: Amplification and manipulation of magnon spin currents on the micron-scale
    T. Brächer, P. Pirro, and B. Hillebrands
    Physics Reports 699, 1 (2017)
  3. Magnonic crystals for data processing
    A. V. Chumak, A. A. Serga, and B. Hillebrands
    J. Phys. D: Appl. Phys. 50, 244001 (2017)
  4. Magnonics: spin waves connecting charges, spins and photons
    A. V. Chumak and H. Schultheiss
    J. Phys. D: Appl. Phys. 50, 300201 (2017)
  5. Magnon spintronics
    A. V. Chumak, V. I. Vasyuchka, A. A. Serga, and B. Hillebrands
    Nat. Phys. 11, 453 (2015)
  6. Magnetische Materialien nach Maß für die Spintronik
    M. Vogel, A. V. Chumak, B. Hillebrands, and G. von Freymann
    Physik in unserer Zeit 46, 217 (2015)
  7. Magnon spintronics
    A. D. Karenowska, A. V. Chumak, A. A. Serga, and B. Hillebrands
    In: Handbook of Spintronics, Y. Xu, D. D. Awschalom, J. Nitta (eds.),
    Springer, pp. 1505-1549 (2015)
  8. Magnonen für den Computer von Übermorgen
    B. Leven, A. V. Chumak, B. Hillebrands
    Physik in unserer Zeit 46 , 34 (2015)
  9. Topical Review: The 2014 Magnetism Roadmap
    R. L. Stamps, S. Breitkreutz, J. Åkerman, A. V. Chumak, Y. Otani, G. E. W. Bauer, J.-U. Thiele, M. Bowen,
    S. A. Majetich, M. Kläui, I. L. Prejbeanu, B. Dieny, N. M. Dempsey, and B. Hillebrands
    J. Phys. D: Appl. Phys. 47, 333001 (2014)
  10. The dynamic magnonic crystal: New horizons in artificial crystal based signal processing
    A. V. Chumak, A. D. Karenowska, A. A. Serga, and B. Hillebrands
    In: Topics in Applied Physics, Vol.125: Magnonics From Fundamentals to Applications, S. O. Demokritov, and A. N. Slavin (eds.), pp. 243-255
    Springer, Berlin (2013)
  11. YIG magnonics
    A. A. Serga, A. V. Chumak, and B. Hillebrands
    J. Phys. D: Appl. Phys. 43, 264002 (2010)

Honours and Awards

  • Qi Wang, Chinese government award for outstanding self-finance students abroad, established by the China Scholarship Council, 2019.
  • Martin Kewenig, the best poster at the 3rd International Advanced School on Magnonics 2018 in Kyiv entitled "Realization of a micro-scaled spin-wave majority gate”, September 2018.
  • Michael Schneider, the best poster at the 21st international conference on magnetism in San Francisco entitled "Bose-Einstein Condensation of Magnons by Rapid Cooling”, July 2018.
  • Björn Heinz, membership of Graduate School of Excellence Materials Science in Mainz (MAINZ), 2018.
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