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Reprogrammable magnonics based on periodic and aperiodic ferromagnetic nanostructures

Applicant Grundler Dirk
Number 163016
Funding scheme Project funding
Research institution Laboratoire des matériaux magnétiques nanostructurés et magnoniques EPFL - STI - IMX - LMGN
Institution of higher education EPF Lausanne - EPFL
Main discipline Condensed Matter Physics
Start/End 01.04.2016 - 31.12.2020
Approved amount 553'328.00
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All Disciplines (2)

Discipline
Condensed Matter Physics
Material Sciences

Keywords (6)

nanotechnology; ferromagnetic thin films; spin waves; nanomagnetism; magnonics; microwaves

Lay Summary (German)

Lead
Kollektive Anregungen von Spinmomenten in ferromagnetischen Materialien erfahren ein erneutes Interesse, da elektromagnetische Wellen (Radiowellen) an wellenförmige Spinanregungen (Magnonen) ankoppeln und bei fester Frequenz ihre Wellenlänge um den Faktor 10.000 oder mehr reduzieren. Für die technische Nutzbarmachung besteht die materialwissenschaftliche Herausforderung, magnetische Dünnfilm-Materialien gezielt zu strukturieren und Spinwellenausbreitung auf der Nanometerskala zu verstehen und zu kontrollieren.
Lay summary

Wir untersuchen dynamische Eigenschaften von magnetischen Nanostrukturen im GHz-Frequenzbereich. Mit Experimenten und Simulationen tragen wir zum Verständnis von Wellenausbreitung in anisotropen Medien und Metamaterialien bei, d.h. in künstlich erzeugten Materialien, die Eigenschaften aufweisen, die in der Natur nicht vorkommen. Dazu gehören z.B. künstliche magnonische Kristalle. In ihrem Fall sind wir daran interessiert, wie sich magnetische Defekte – vergleichbar mit Störstellen und Dotierung in Halbleitern - auf Transporteigenschaften der Spinwellen auswirken. Mit unserem “Material-by-Design”-Ansatz wollen wir ebenfalls zum Verständnis quasikristalliner Materialien beitragen.

Der untersuchte Frequenzbereich von einigen GHz ist für die Informationstechnologie von grosser Bedeutung, d.h. WLAN-Netze, tragbare Telefone und das Internet der Dinge, für das eine rasante Entwicklung vorausgesagt wird. Die Magnonik-Forschung ermöglicht miniaturisierte Mikrowellenbauelemente, die Speicherfähigkeit sowie logische Datenprozessierung kombinieren und resourcenschonend an veränderte Funknetze angepasst werden können.

Direct link to Lay Summary Last update: 19.11.2015

Responsible applicant and co-applicants

Employees

Publications

Publication
Tuning interactions in reconfigurable kagome artificial spin ices for magnonics
Bhat Vinayak S., Grundler Dirk (2021), Tuning interactions in reconfigurable kagome artificial spin ices for magnonics, in Appl. Phys. Lett., 119(092403), 092403-1-092403-5.
Direct observation of multiband transport in magnonic Penrose quasicrystals via broadband and phase-resolved spectroscopy
Watanabe Sho, Bhat Vinayak S., Baumgaertl Korbinian, Hamdi Mohammad, Grundler Dirk (2021), Direct observation of multiband transport in magnonic Penrose quasicrystals via broadband and phase-resolved spectroscopy, in Science Advances, 7(35), eabg3771-eabg3771.
Bistable nanomagnet as programmable phase inverter for spin waves
Baumgaertl Korbinian, Grundler Dirk (2021), Bistable nanomagnet as programmable phase inverter for spin waves, in Applied Physics Letters, 118(16), 162402-162402.
The 2021 Magnonics Roadmap
Barman A, Gubbiotti Gianluca, Ladak Sam, Adeyeye Adekunle Olusola, Krawczyk Maciej, Gräfe Joachim, Adelmann Christoph, Cotofana Sorin, Naeemi Azad, Vasyuchka Vitaliy I, Hillebrands Burkard, Nikitov S A, Yu Haiming, Grundler Dirk, Sadovnikov Alexandr, Grachev Andrew A., Sheshukova S. E., Duquesne Jean-Yves, Marangolo Massimiliano, Gyorgy Csaba, Porod Wolfgang, Demidov V E, Urazhdin Sergei, Demokritov Sergej, et al. (2021), The 2021 Magnonics Roadmap, in Journal of Physics: Condensed Matter, 1-72.
Single shot acquisition of spatially resolved spin wave dispersion relations using X-ray microscopy
Träger Nick, Groß Felix, Förster Johannes, Baumgaertl Korbinian, Stoll Hermann, Weigand Markus, Schütz Gisela, Grundler Dirk, Gräfe Joachim (2020), Single shot acquisition of spatially resolved spin wave dispersion relations using X-ray microscopy, in Scientific Reports, 10(1), 18146-18146.
Efficient wavelength conversion of exchange magnons below 100 nm by magnetic coplanar waveguides
Che Ping, Baumgaertl Korbinian, Kúkol’ová Anna, Dubs Carsten, Grundler Dirk (2020), Efficient wavelength conversion of exchange magnons below 100 nm by magnetic coplanar waveguides, in Nature Communications, 11(1), 1445-1445.
Magnon Modes of Microstates and Microwave-Induced Avalanche in Kagome Artificial Spin Ice with Topological Defects
Bhat V. S., Watanabe S., Baumgaertl K., Kleibert A., Schoen M. A. W., Vaz C. A. F., Grundler D. (2020), Magnon Modes of Microstates and Microwave-Induced Avalanche in Kagome Artificial Spin Ice with Topological Defects, in Physical Review Letters, 125(11), 117208-117208.
Nanoimaging of Ultrashort Magnon Emission by Ferromagnetic Grating Couplers at GHz Frequencies
Baumgaertl Korbinian, Gräfe Joachim, Che Ping, Mucchietto Andrea, Förster Johannes, Träger Nick, Bechtel Michael, Weigand Markus, Schütz Gisela, Grundler Dirk (2020), Nanoimaging of Ultrashort Magnon Emission by Ferromagnetic Grating Couplers at GHz Frequencies, in Nano Letters, 20(10), 7281-7286.
Plasma-enhanced atomic layer deposition of nickel nanotubes with low resistivity and coherent magnetization dynamics for 3D spintronics
Giordano Maria Carmen, Baumgaertl Korbinian, Escobar Steinvall Simon, Gay Julien, Vuichard Martin, Fontcuberta i Morral Anna, Grundler Dirk (2020), Plasma-enhanced atomic layer deposition of nickel nanotubes with low resistivity and coherent magnetization dynamics for 3D spintronics, in ACS Applied Materials & Interfaces, 12(36), 40443-40452.
Nonreciprocal surface acoustic wave propagation via magneto-rotation coupling
Xu Mingran, Yamamoto Kei, Puebla Jorge, Baumgaertl Korbinian, Rana Bivas, Miura Katsuya, Takahashi Hiromasa, Grundler Dirk, Maekawa Sadamichi, Otani Yoshichika (2020), Nonreciprocal surface acoustic wave propagation via magneto-rotation coupling, in Science Advances, 6(32), eabb1724.
Direct Observation of Worm‐Like Nanochannels and Emergent Magnon Motifs in Artificial Ferromagnetic Quasicrystals
Watanabe Sho, Bhat Vinayak S., Baumgaertl Korbinian, Grundler Dirk (2020), Direct Observation of Worm‐Like Nanochannels and Emergent Magnon Motifs in Artificial Ferromagnetic Quasicrystals, in Adv. Func. Mater., 30, 202001388.
Chiral Spin-Wave Velocities Induced by All-Garnet Interfacial Dzyaloshinskii-Moriya Interaction in Ultrathin Yttrium Iron Garnet Films
Wang Hanchen, Chen Jilei, Liu Tao, Zhang Jianyu, Baumgaertl Korbinian, Guo Chenyang, Li Yuehui, Liu Chuanpu, Che Ping, Tu Sa, Liu Song, Gao Peng, Han Xiufeng, Yu Dapeng, Wu Mingzhong, Grundler Dirk, Yu Haiming (2020), Chiral Spin-Wave Velocities Induced by All-Garnet Interfacial Dzyaloshinskii-Moriya Interaction in Ultrathin Yttrium Iron Garnet Films, in Physical Review Letters, 124(2), 027203-027203.
Angle-dependent magnetization dynamics with mirror-symmetric excitations in artificial quasicrystalline nanomagnet lattices
Bhat Vinayak S., Grundler Dirk (2018), Angle-dependent magnetization dynamics with mirror-symmetric excitations in artificial quasicrystalline nanomagnet lattices, in Phys. Rev. B, 98, 174408-1-174408-5.
Phase control of spin waves based on a magnetic defect in a one-dimensional magnonic crystal
Baumgaertl Korbinian, Watanabe Sho, Grundler Dirk (2018), Phase control of spin waves based on a magnetic defect in a one-dimensional magnonic crystal, in Applied Physics Letters, 112(14), 142405-142405.
Angular-dependent magnetization dynamics of kagome artificial spin ice incorporating topological defects
Bhat V. S., Heimbach F., Stasinopoulos I., Grundler D. (2017), Angular-dependent magnetization dynamics of kagome artificial spin ice incorporating topological defects, in Physical Review B, 96(1), 014426-014426.

Datasets

Phase control of spin waves based on a magnetic defect in a one-dimensional magnonic crystal

Author Baumgaertl, Korbinian; Watanabe, Sho; Grundler, Dirk
Publication date 02.08.2018
Persistent Identifier (PID) 10.5281/zenodo.1326874
Repository zenodo
Abstract
Raw data associated to the manuscript ‘’Phase control of spin waves based on a magnetic defect in a one-dimensional magnonic crystal‘’, Appl. Phys. Lett. 112, 142405 (2018); doi: 10.1063/1.5024541File formats are described in info.txt files in the concerning folders. For plotting and data evaluation, Python 2.7 and OriginPro 8.6G were used. Example scrips for plotting are provided.

Efficient wavelength conversion of exchange magnons below 100 nm by magnetic coplanar waveguides

Author Che, Ping; Baumgaertl, Korbinian; Kukolova, Anna; Dubs, Carsten; Grundler, Dirk
Publication date 31.01.2020
Persistent Identifier (PID) doi.org/10.5281/zenodo.3633075
Repository Zenodo
Abstract
Raw data associated to the manuscript ‘Efficient wavelength conversion of exchange magnons below 100 nm by magnetic coplanar waveguides.” File formats are described in info.txt files in the concerning folders. For plotting and data evaluation, Python 2.7, Matlab 2018b and OriginPro 2018b were used.

Direct Observation of Worm‐Like Nanochannels and Emergent Magnon Motifs in Artificial Ferromagnetic Quasicrystals

Author Watanabe, Sho; Bhat, Vinayak S.; Baumgaertl, Korbinian; Grundler, Dirk
Publication date 17.07.2020
Persistent Identifier (PID) http://doi.org/10.5281/zenodo.3949942
Repository Zenodo
Abstract
Raw data associated to the manuscript ‘’Direct Observation of Worm‐Like Nanochannels and Emergent Magnon Motifs in Artificial Ferromagnetic Quasicrystals‘’, Adv. Funct. Mater. 2001388 (2020). (DOI: https://doi.org/10.1002/adfm.202001388)File formats are described in read_me.pdf files in the concerning folders. For plotting and data evaluation, Python 2.7 and OOMMF were used. Example scrips for plotting are provided.

Data files of "Plasma-enhanced atomic layer deposition of nickel nanotubes with low resistivity and coherent magnetization dynamics for 3D spintronics"

Author Giordano, Maria Carmen; Baumgaertl, Korbinian; Escobar Steinvall, Simon; Gay, Julien; Vuichard, Martin; Fontcuberta i Morral, Anna; Grundler, Dirk
Publication date 12.08.2020
Persistent Identifier (PID) DOI: 10.5281/zenodo.3980290
Repository Zenodo
Abstract
Raw data associated to the manuscript "Plasma-enhanced atomic layer deposition of nickel nanotubes with low resistivity and coherent magnetization dynamics for 3D spintronics". Journal: ACS Appl. Mater. Interfaces (2020); doi: 10.1021/acsami.0c06879. For plotting and data evaluation Python 2.7, Excell and Origin 2008b were used. Extra information were provided in info.txt files.

Nanoimaging of Ultrashort Magnon Emission by Ferromagnetic Grating Couplers at GHz Frequencies

Author Baumgaertl, Korbinian; Gräfe, Joachim; Che, Ping; Mucchietto, Andrea; Förster, Johannes; Träger, Nick; Bechtel, Michael; Weigand, Markus; Schütz, Gisela; Grundler, Dirk
Publication date 26.08.2020
Persistent Identifier (PID) DOI:10.5281/zenodo.4001711
Repository Zenodo
Abstract
Raw data associated to the manuscript “Nanoimaging of Ultrashort Magnon Emission by Ferromagnetic Grating Couplers at GHz Frequencies”, Nano Letters (2020), DOI: https://dx.doi.org/10.1021/acs.nanolett.0c02645Information about file formats and measurement parameters are described in read_me.txt files in the specific folders. For plotting Python 3.7 was used, example scripts are provided.

Magnon Modes of Microstates and Microwave-Induced Avalanche in Kagome Artificial Spin Ice with Topological Defects

Author Watanabe, Sho; Watanabe, Sho; Baumgaertl, Korbinian; Kleibert, Armin; Schoen, Martin; Vaz, Carlos; Grundler, Dirk
Publication date 24.08.2020
Persistent Identifier (PID) 10.5281/zenodo.3997242
Repository Zenodo
Abstract
The folder contains the dataset for the manuscript entitled "Magnon Modes of Microstates and Microwave-Induced Avalanche in Kagome Artificial Spin Ice with Topological Defects".

Bistable nanomagnet as programable phase inverter for spin waves

Author Baumgaertl, Korbinian; Grundler, Dirk
Persistent Identifier (PID) https://doi.org/10.5281/zenodo.4680409
Repository Zenodo
Abstract
Raw data associated to the manuscript “Bistable nanomagnet as programable phase inverter for spin waves”, Applied Physics Letters 118, 000000 (2021), DOI: https://doi.org/10.1063/5.0048825Information about file formats and measurement parameters are described in text files in the specific folders. For micromagnetic simulations Mumax 3.10 was used. The simulation scripts (*.mx3 files) and exemplary plotting scripts in Python 3.9 (*.py files) are included.Paper abstract:To realize spin wave logic gates, programable phase inverters are essential. We image using phase-resolved Brillouin light scattering microscopy propagating spin waves in a one-dimensional magnonic crystal consisting of dipolarly coupled magnetic nanostripes. We demonstrate phase shifts upon a single nanostripe of opposed magnetization. Using micromagnetic simulations, we model our experimental finding in a wide parameter space of bias fields and wave vectors. We find that low-loss phase inversion is achieved, when the internal field of the oppositely magnetized nanostripe is tuned such that the latter supports a resonant standing spin wave mode with an odd quantization number at the given frequency. Our results are key for the realization of phase inverters with optimized signal transmission.

Data set

Author Watanabe, Sho; Bhat, Vinayak S.; Baumgaertl, Korbinian; Hamdi, Mohammad; Grundler, Dirk
Publication date 25.08.2021
Persistent Identifier (PID) doi:10.5281/zenodo.5146424
Repository zenodo
Abstract
File formats are described in read_me.pdf files in the concerning folders. For plotting and data evaluation, Python 2.7 was used. Example scrips for plotting are provided.

Tuning interactions in reconfigurable kagome artificial spin ices for magnonics

Author Bhat, Vinayak S.; Grundler, Dirk
Publication date 23.08.2021
Persistent Identifier (PID) https://doi.org/10.5281/zenodo.5235007
Repository Zenodo
Abstract
The attached folder contains the dataset for the manuscript entitled "Tuning interactions in reconfigurable kagome artificial spin ices for magnonics".The research was supported by the Swiss National Science Foundation via Grant No. 163016. V.S. Bhat acknowledges support from the foundation for Polish Science through the IRA Programme financed by EU within SG OP Programme.

Collaboration

Group / person Country
Types of collaboration
Microscopy & Magnetism Group/Paul Scherrer Institut Switzerland (Europe)
- Research Infrastructure
Prof. Otani, RIKEN/ISSP U Tokyo Japan (Asia)
- Publication
- Exchange of personnel
Dr. C. Dubs, Innovent Jena e.V. Germany (Europe)
- Publication
Department Materials for green spintronics/Helmholtz-Berlin Germany (Europe)
- Research Infrastructure
Physik-Department E51, Technische Universität München Germany (Europe)
- Research Infrastructure
Prof. Schütz/Max-Planck-Institute for Intelligent Systems Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
Prof. Haiming Yu/Spintronics Center/Beihang China (Asia)
- in-depth/constructive exchanges on approaches, methods or results
- Publication

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
Intermag 2021 Talk given at a conference Towards Wave-based Logic Operation using Multi-directional sub-100 nm Magnons 26.04.2021 zoom, United States of America Grundler Dirk; Watanabe Sho;
Public Defense Individual talk Magnonic crystals with reconfigurable magnetic defects for spin-based microwave electronics 24.03.2021 Zoom, Switzerland Grundler Dirk; Baumgärtl Korbinian;
EDMX Research Day 2021 Talk given at a conference Magnons in aperiodic worm-like nanochannels of 2D artificial magnetic quasicrystals 10.02.2021 zoom, Switzerland Grundler Dirk; Watanabe Sho;
Joint European Magnetic Symposia 2020 - JEMS2020 Talk given at a conference Coherent nanomagnonics based on thin yttrium iron garnet 07.12.2020 Lisbon/WWW, Portugal Baumgärtl Korbinian; Watanabe Sho; Grundler Dirk;
CMi Day 2019 Poster TWO-DIMENSIONAL ARTIFICIAL FERROMAGNETIC QUASICRYSTALS 07.05.2020 Lausanne, Switzerland Watanabe Sho; Grundler Dirk; Baumgärtl Korbinian;
EDMX Research Day 2019 Poster Omnidirectional spin wave emission via nano-engineering of artificial quasicrystals 29.11.2019 EPFL, Switzerland Grundler Dirk; Watanabe Sho; Baumgärtl Korbinian;
64th conference Magnetism and Magnetic Materials Talk given at a conference Exploration of modified density of states and multi- directional emission of spin-waves in artificial magnetic quasicrystals 04.11.2019 Las Vegas, United States of America Watanabe Sho;
64th conference Magnetism and Magnetic Materials Talk given at a conference Direct observation of short-wave magnons emitted from periodic and aperiodic grating couplers 04.11.2019 Las Vegas, United States of America Baumgärtl Korbinian;
VII Euro-Asian Symposium«Trends in MAGnetism» Talk given at a conference Artificial crystals and quasicrystals for nanomagnonics based on ferro- and ferrimagnetic nanostructures 08.09.2019 Ekaterinburg, Russia Grundler Dirk;
Joint European Magnetic Symposia JEMS 2019 Talk given at a conference Artificial crystals and quasicrystals for nanomagnonics 26.08.2019 Uppsala, Sweden Grundler Dirk;
Magnonics 2019 Poster Worm-like nanochannels in artificial ferromagnetic quasicrystals 28.07.2019 Caravigno, Italy Watanabe Sho; Grundler Dirk;
SOL-SKYMAG 2019 Talk given at a conference Spatially resolved magnon modes in artificial crystals and quasi-crystals 24.06.2019 San Sebastian, Spain Grundler Dirk;
Swiss Nano Convention 2019 Poster Formation of worm-like nanochannels in artificial magnetic quasicrystal & Periodic and Aperiodic spin-wave nanograting couplers 06.06.2019 Lausanne, Switzerland Watanabe Sho; Baumgärtl Korbinian;
Frontiers in Artificial Spin Ice Workshop Talk given at a conference From localized magnons to worm-like nanochannels – artificial spin ice and quasicrystals for reprogrammable magnonics 06.02.2019 Bad Zurzach, Switzerland Grundler Dirk;
EDMX Research Day 2018 Poster Emergent magnon motifs and worm-like nanochannels in artificial ferromagnetic quasicrystals 12.12.2018 Lausanne, Switzerland Grundler Dirk; Watanabe Sho; Baumgärtl Korbinian;
Journée d'accueil_visites de lab Individual talk Magnetic imaging on the nanoscale 14.09.2018 Lausanne, Switzerland Watanabe Sho;
Joint European Magnetic Symposia (JEMS) 2018 Poster Broadband spin-wave spectroscopy on artificial ferromagnetic quasicrystals revealing characteristic mode motifs 03.09.2018 Mainz, Germany Grundler Dirk;
SPS Annual Meeting 2018 Poster Broadband spin-wave spectroscopy on artificial ferromagnetic quasicrystals identifying characteristic mode motifs 28.08.2018 Lausanne, Switzerland Watanabe Sho; Grundler Dirk;
SPS Annual Meeting 2018 Talk given at a conference Study of Kagome Artificial Spin Ice via MFM, VNA-FMR, and BLS 28.08.2018 Lausanne, Switzerland Watanabe Sho; Baumgärtl Korbinian; Grundler Dirk;
SolSkyMag 2018 Talk given at a conference MAGNONIC CRYSTALS WITH AND WITHOUT TAILORED MAGNETIC DEFECTS: PHASE CONTROL AND GRATING COUPLER EFFECT 18.06.2018 San Sebastian, Spain Grundler Dirk; Baumgärtl Korbinian;
CMI day 2018 Poster TWO-DIMENSIONAL ARTIFICIAL FERROMAGNETIC QUASICRYSTALS 08.05.2018 Lausanne, Switzerland Grundler Dirk; Watanabe Sho;
Nano-Magnonics workshop 2018 Poster Direct observation of a tunable spin wave phase shift at a magnetic defect in a one-dimensional magnonic crystal 19.02.2018 Kaiserslautern, Germany Baumgärtl Korbinian; Watanabe Sho;
Nano-Magnonics workshop 2018 Poster Exploration of Topological Defects in Kagome Artificial Spin Ice via Brillouin Light Scattering 19.02.2018 Kaiserslautern, Germany Watanabe Sho; Baumgärtl Korbinian;
Invited Talk at the Physics Faculty, EPF Lausanne Individual talk Mastering magnons on the nanoscale: spin waves in periodic and quasicrystalline spin structures and nanomagnet lattices 15.12.2017 Lausanne, Switzerland Baumgärtl Korbinian; Watanabe Sho; Grundler Dirk;
Colloquium at the Max-Planck-Institut, Stuttgart, Germany Individual talk Artificial magnonic crystals from periodic and quasicrystalline lattices of nanostructured magnets 05.12.2017 Stuttgart, Germany Grundler Dirk; Baumgärtl Korbinian; Watanabe Sho;
SPS Meeting 2017 Poster Spin wave excitations in ferromagnetic antidot lattices with penrose tilings 23.08.2017 Geneva, Switzerland Watanabe Sho; Grundler Dirk;
SPS Meeting 2017 Poster Spin wave scattering by a magnetic defect in a magnonic crystal detected by Brillouin light scattering microscopy 23.08.2017 Geneva, Switzerland Baumgärtl Korbinian; Watanabe Sho; Grundler Dirk;
Magnonics 2017 Poster Angular dependent magnetization dynamics of quasicrystalline nanomagnet lattices 07.08.2017 Oxford, Great Britain and Northern Ireland Grundler Dirk; Watanabe Sho;
Magnonics 2017 Poster Spin wave excitations in ferromagnetic antidot lattices with Penrose tilings 07.08.2017 Oxford, Great Britain and Northern Ireland Watanabe Sho; Grundler Dirk;
Magnonics 2017 Poster Spin wave scattering by a magnetic defect in a magnonic crystal detected by Brillouin light scattering microscopy 07.08.2017 Oxford, Great Britain and Northern Ireland Grundler Dirk; Baumgärtl Korbinian; Watanabe Sho;
Magnonics 2017 Talk given at a conference Spin waves in nanostructured magnetic lattices for sub-100 nm magnonics 07.08.2017 Oxford, Great Britain and Northern Ireland Grundler Dirk; Watanabe Sho; Baumgärtl Korbinian;
Loch Lomond Workshop on Artificial Spin Ice Talk given at a conference Angular Dependent Magnetization Dynamics of Periodic and Quasicrystalline Nanomagnet Lattices 26.06.2017 Loch Lomond/Glasgow, Great Britain and Northern Ireland Grundler Dirk; Watanabe Sho;
CMI day 2017 Poster TWO-DIMENSIONAL ARTIFICIAL FERROMAGNETIC QUASICRYSTALS 02.05.2017 Lausanne, Switzerland Grundler Dirk; Watanabe Sho;


Knowledge transfer events

Active participation

Title Type of contribution Date Place Persons involved
STUDY WEEK Chemistry & Materials Science Performances, exhibitions (e.g. for education institutions) 03.02.2020 Lausanne, Switzerland Grundler Dirk; Watanabe Sho;
Supervision of an internship student Performances, exhibitions (e.g. for education institutions) 25.06.2019 EPFL, Switzerland Grundler Dirk; Watanabe Sho;
Journée d'accueil_visites de lab Performances, exhibitions (e.g. for education institutions) 18.09.2018 Lausanne, Switzerland Watanabe Sho;


Communication with the public

Communication Title Media Place Year
Media relations: print media, online media Ist die Elektronik, so wie wir sie kennen, am Ende? Magnetische Kristallschichten für den Computer v idw - Informationsdienst Wissenschaft International 2020
Media relations: print media, online media Magnetische Kristallschichten für den Computer von Morgen Innovations Report International 2020
Media relations: print media, online media Magnetische wormen voor communicatiesystemen op nanoschaal engineersonline.nl International 2020
New media (web, blogs, podcasts, news feeds etc.) Magnon Modes of Microstates and Microwave-Induced Avalanche in Kagome Artificial Spin Ice with Topol PSI Labs & User Service International 2020
Media relations: print media, online media Magnonics Researchers at EPFL Use Magnetic Worms to Engineer Nanoscale Communication Systems Magnetics - Business&Technology International 2020
Media relations: print media, online media Microwave-Induced Avalanche in Kagome Artificial Spin Ice PSI website: Microscopy (SIM) Beamline International 2020
Talks/events/exhibitions Nano-imaging of magnetization reversal Western Switzerland Rhaeto-Romanic Switzerland German-speaking Switzerland Italian-speaking Switzerland 2020
Media relations: print media, online media Scientists develop principles for the creation of an 'acoustic diode' phys.org International 2020
Media relations: print media, online media Using magnetic worms to engineer nanoscale communication systems Phys Org International 2020
Talks/events/exhibitions EPFL Open House Days Western Switzerland 2019
Talks/events/exhibitions Tour for Japanese visitors at the laboratory for nanostructured magnetic materials and magnonics International 2018
Talks/events/exhibitions Visite Gymnase du Bugnon, Nanoaimants pour détection et stockage des données Western Switzerland 2017
Talks/events/exhibitions Towards spinning tops that never stop Western Switzerland 2016

Associated projects

Number Title Start Funding scheme
189644 Versatile high sensitivity and throughput magnetometer for quantum, functional and applied materials 01.03.2020 R'EQUIP
197360 Synthesis and functionalities of nanoscale magnonic superstructures 01.06.2021 Project funding

Abstract

Magnetic nanostructures periodically arranged in one and two dimensions have been shown to provide tailored band structures for spin waves (magnons) which can be reprogrammed via different magnetic states. These so-called reconfigurable magnonic crystals are interesting for advanced wave control in solids. We now want to go one step further and explore (A) reconfigurable magnetic defects in magnonic crystals and (B) spin-wave propagation in artificial ferromagnetic quasicrystals. In the magnonic crystals, we want to understand spin-wave scattering on nanoscale magnetic defects where the gyrotropy of the spin-precessional motion plays the important role. We plan to investigate the transmission and reflection coeffcients depending on SW wavelengths that range from a few µm down to a few 100 nm. For the studies we intend to use nanofabrication, broadband spin-wave spectroscopy using integrated microwave antenna, spatially resolved Brillouin light scattering, magnetic force microscopy and micromagnetic simulations. The results and fundamental understanding will enable reprogrammable spin-wave cavities and three-terminal spin-wave devices. They advance magnonic devices relying on spin-wave control on the nanoscale such as spin-wave logic. For magnetic quasicrystals we will follow the material-by-design approach in that we plan to fabricate artificial ferromagnetic quasicrystals (AFQs) from either interconnected or disconnected nanomagnets. The material-by-design approach using nanofabrication technologies has been conducted for artificial spin ice in recent years consisting of periodic nanomagnet arrays. But correspondingly prepared quasicrystalline structures, i.e., materials that are positionally ordered but exhibit no translational invariance, as considered here are much less investigated. One major advantage of the material-by-design approach is that we can tune both physical parameters of individual nanomagnets (via material, shape and size) and magnetic interactions between them (via different tilings and lateral constants). The interaction can be short (via exchange) and long range (via dipolar interaction). We consider AFQs to form reconfigurable magnonic (quasi)crystals and plan to study spin-wave propagation in different magnetic states. Thereby we will deepen our understanding about the role of aperiodicity on the magnetic properties and collective spin excitations. We will contribute to both the fundamental understanding of the properties of quasicrystalline materials and the research field of magnonics.
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