Junior Research Group - Group Leader: Jun.-Prof. Dr. habil. Andrii Chumak
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.
- Integrated magnonic half-adder
Q. Wang, R. Verba, T. Brächer, P. Pirro, A. V. Chumak
- 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
- 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 A. V. Chumak
- 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
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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
- 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) arXiv:1901.08934
- 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)
- Magnonic crystals for data processing
A. V. Chumak, A. A. Serga, and B. Hillebrands
J. Phys. D: Appl. Phys. 50, 244001 (2017)
- Magnonics: spin waves connecting charges, spins and photons
A. V. Chumak and H. Schultheiss
J. Phys. D: Appl. Phys. 50, 300201 (2017)
- Magnon spintronics
A. V. Chumak, V. I. Vasyuchka, A. A. Serga, and B. Hillebrands
Nat. Phys. 11, 453 (2015)
- 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)
- 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)
- Magnonen für den Computer von Übermorgen
B. Leven, A. V. Chumak, B. Hillebrands
Physik in unserer Zeit 46 , 34 (2015)
- 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)
- 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)
- 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.
- H2020-FETOPEN CHIRON "Spin wave computing for ultimately-scaled hybrid low-power electronics"
- ERC Starting Grant MagnonCircuits "Nano-scale magnonic circuits for novel computing systems"
- DFG SFB/TRR 173, Project B01 "Spin + Magnon: Spin excitations for information processing"
- DFG SFB/TRR 173, Project B04 "Spin + Magnon Control: Dynamic control of magnon properties"
- DFG Normalverfahren "Functional layers of nanometer-thick YIG films and microstructured surfaces for spintronic application"
- Landesforschungszentrum Optik und Materialwissenschaften (State Research Center Optics and Materials Science, OPTIMAS)
- MAINZ Graduate School of Excellence - Materials Science in Mainz