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Discovery and Nanoengineering of Novel Skyrmion-hosting Materials

Applicant Grundler Dirk
Number 171003
Funding scheme Sinergia
Research institution Laboratoire des matériaux magnétiques nanostructurés et magnoniques EPFL - STI - IMX - LMGN
Institution of higher education EPF Lausanne - EPFL
Main discipline Interdisciplinary
Start/End 01.10.2017 - 30.09.2021
Approved amount 2'698'967.00
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All Disciplines (5)

Discipline
Interdisciplinary
Material Sciences
Condensed Matter Physics
Technical Physics
Inorganic Chemistry

Keywords (8)

magnetic skyrmion; spintronics; magnetic materials; computational materials science; magnonics; nanotechnology; correlated electrons; electromagnetic waves

Lay Summary (German)

Lead
Magnetische Materialien sind wichtig für Informationstechnologie und Sensorik. Bisher spielen hierbei die chiralen Volumenmaterialien keine Rolle, in denen vor wenigen Jahren die nanoskaligen magnetischen Skyrmionen entdeckt wurden. Damit diese teilchenartigen Spinwirbel technisch genutzt werden können, ist es erforderlich die Materialbasis zu verbreitern und geeignete Methoden der Materialprozessierung und Nanostrukturierung zu erforschen.
Lay summary

Als übergeordnetes Ziel wollen wir durch Kombination von computergestützter Datenbankanalyse, chemischer Synthese und hochreiner Dünnfilmabscheidung neuartige Materialien identifizieren und herstellen, die magnetische Skyrmionen und komplexe Spinstrukturen für technische Anwendungen bei Raumtemperatur stabilisieren. Im Detail wollen wir durch spezielle Messtechniken ihre statischen und dynamischen Eigenschaften von der mikroskopischen Längenskala bis zum Volumenmaterial untersuchen, um die bisher ungelöste Frage zu beantworten, wie chirale Magneten durch moderne Nanotechnologien für technische Anwendungen optimiert werden können.

Wissenschaftlicher und Gesellschaftlicher Kontext

Chirale Magnete treten in allen drei Materialklassen auf, die für technologische Anwendungen wichtig sind: Metalle, Halbleiter, Isolatoren. Neben besonderen Spinstrukturen können sie  spezielle elektromagnetische Eigenschaften besitzen. Chirale Materialien ermöglichen technische Anwendungen, die Energieeffizienz und Resourcenschonung versprechen. Dies sind zwei zentrale Aspekte in unserer Informationsgesellschaft. Allerdings ist bisher nicht etabliert, wie neue Elementverbindungen identifiziert werden können, die die relevanten Eigenschaften für Raumtemperatur optimiert bereitstellen. Unsere Forschung ist in diesem Zusammenhang von zentraler Bedeutung.

Direct link to Lay Summary Last update: 09.05.2017

Responsible applicant and co-applicants

Employees

Project partner

Publications

Publication
Macroscopic manifestation of domain-wall magnetism and magnetoelectric effect in a Néel-type skyrmion host
Geirhos Korbinian, Gross Boris, Szigeti Bertalan G., Mehlin Andrea, Philipp Simon, White Jonathan S., Cubitt Robert, Widmann Sebastian, Ghara Somnath, Lunkenheimer Peter, Tsurkan Vladimir, Neuber Erik, Ivaneyko Dmytro, Milde Peter, Eng Lukas M., Leonov Andrey O., Bordács Sándor, Poggio Martino, Kézsmárki István (2020), Macroscopic manifestation of domain-wall magnetism and magnetoelectric effect in a Néel-type skyrmion host, in npj Quantum Materials, 5(1), 44-44.
Stability of Néel-type skyrmion lattice against oblique magnetic fields in GaV4S8 and GaV4Se8
Gross B., Philipp S., Geirhos K., Mehlin A., Bordács S., Tsurkan V., Leonov A., Kézsmárki I., Poggio M. (2020), Stability of Néel-type skyrmion lattice against oblique magnetic fields in GaV4S8 and GaV4Se8, in Physical Review B, 102(10), 104407-104407.
Melting of a skyrmion lattice to a skyrmion liquid via a hexatic phase
Huang Ping, Schönenberger Thomas, Cantoni Marco, Heinen Lukas, Magrez Arnaud, Rosch Achim, Carbone Fabrizio, Rønnow Henrik M. (2020), Melting of a skyrmion lattice to a skyrmion liquid via a hexatic phase, in Nature Nanotechnology, 15, 761-767.
Efficient wavelength conversion of exchange magnons below 100 nm by magnetic coplanar waveguides
ChePing, BaumgaertlKorbinian, KukolovaAnna, DubsCarsten, GrundlerDirk (2020), Efficient wavelength conversion of exchange magnons below 100 nm by magnetic coplanar waveguides, in Nat.Comm., 11, 1445.
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.
Deformation of the moving magnetic skyrmion lattice in MnSi under electric current flow
Okuyama D., Bleuel M., White J. S., Ye Q., Krzywon J., Nagy G., Im Z. Q., Živković I., Bartkowiak M., Rønnow H. M., Hoshino S., Iwasaki J., Nagaosa N., Kikkawa A., Taguchi Y., Tokura Y., Higashi D., Reim J. D., Nambu Y., Sato T. J. (2019), Deformation of the moving magnetic skyrmion lattice in MnSi under electric current flow, in Communications Physics, 2(1), 79-79.
Stray-Field Imaging of a Chiral Artificial Spin Ice during Magnetization Reversal
Wyss Marcus, Gliga Sebastian, Vasyukov Denis, Ceccarelli Lorenzo, Romagnoli Giulio, Cui Jizhai, Kleibert Armin, Stamps Robert L., PoggioMartino (2019), Stray-Field Imaging of a Chiral Artificial Spin Ice during Magnetization Reversal, in ACS Nano, 13(12), 13910-13916.
Coherent charge and magnetic ordering in Ho/Y superlattice revealed by element-selective x-ray scattering
Ukleev V., Tarnavich V., Tartakovskaya E., Lott D., Kapaklis V., Oleshkevych A., Gargiani P., Valvidares M., White J. S., Grigoriev S. V. (2019), Coherent charge and magnetic ordering in Ho/Y superlattice revealed by element-selective x-ray scattering, in Physical Review B, 100(13), 134417-134417.
New refinement of the crystal structure of Zn(NH 3 ) 2 Cl 2 at 100 K
Ivšić Trpimir, Bi David Wenhua, Magrez Arnaud (2019), New refinement of the crystal structure of Zn(NH 3 ) 2 Cl 2 at 100 K, in Acta Crystallographica Section E Crystallographic Communications, 75(9), 1386-1388.
Imaging pinning and expulsion of individual superconducting vortices in amorphous MoSi thin films
Ceccarelli L., Vasyukov D., Wyss M., Romagnoli G., Rossi N., Moser L., Poggio M. (2019), Imaging pinning and expulsion of individual superconducting vortices in amorphous MoSi thin films, in Physical Review B, 100(10), 104504-104504.
Stabilization of ε−Fe2O3 epitaxial layer on MgO(111)/GaN via an intermediate γ -phase
Ukleev Victor, Volkov Mikhail, Korovin Alexander, Saerbeck Thomas, Sokolov Nikolai, Suturin Sergey (2019), Stabilization of ε−Fe2O3 epitaxial layer on MgO(111)/GaN via an intermediate γ -phase, in Physical Review Materials, 3(9), 094401-094401.
Correlation between site occupancies and spin-glass transition in skyrmion host Co10−x2Zn10−x2Mnx
Nakajima T., Karube K., Ishikawa Y., Yonemura M., Reynolds N., White J. S., Rønnow H. M., Kikkawa A., Tokunaga Y., Taguchi Y., Tokura Y., Arima T. (2019), Correlation between site occupancies and spin-glass transition in skyrmion host Co10−x2Zn10−x2Mnx, in Physical Review B, 100(6), 064407-064407.
Measuring the formation energy barrier of skyrmions in zinc-substituted Cu2OSeO3
Wilson M. N., Crisanti M., Barker C., Štefančič A., White J. S., Birch M. T., Balakrishnan G., Cubitt R., Hatton P. D. (2019), Measuring the formation energy barrier of skyrmions in zinc-substituted Cu2OSeO3, in Physical Review B, 99(17), 174421-174421.
Element-specific soft x-ray spectroscopy, scattering, and imaging studies of the skyrmion-hosting compound Co8Zn8Mn4
Ukleev V., Yamasaki Y., Morikawa D., Karube K., Shibata K., Tokunaga Y., Okamura Y., Amemiya K., Valvidares M., Nakao H., Taguchi Y., Tokura Y., Arima T. (2019), Element-specific soft x-ray spectroscopy, scattering, and imaging studies of the skyrmion-hosting compound Co8Zn8Mn4, in Physical Review B, 99(14), 144408-144408.
Oriented 3D Magnetic Biskyrmions in MnNiGa Bulk Crystals
Li Xiyang, Zhang Shilei, Li Hang, Venero Diego Alba, White Jonathan S, Cubitt Robert, Huang Qingzhen, Chen Jie, He Lunhua, van der Laan Gerrit, Wang Wenhong, Hesjedal Thorsten, Wang Fangwei (2019), Oriented 3D Magnetic Biskyrmions in MnNiGa Bulk Crystals, in Advanced Materials, 1900264-1900264.
Bulk single-crystal growth of the theoretically predicted magnetic Weyl semimetals RAlGe ( R = Pr, Ce)
Puphal Pascal, Mielke Charles, Kumar Neeraj, Soh Y., Shang Tian, Medarde Marisa, White Jonathan S., Pomjakushina Ekaterina (2019), Bulk single-crystal growth of the theoretically predicted magnetic Weyl semimetals RAlGe ( R = Pr, Ce), in Physical Review Materials, 3(2), 024204-024204.
Multiple- q noncollinear magnetism in an itinerant hexagonal magnet
Takagi R., White J. S., Hayami S., Arita R., Honecker D., Rønnow H. M., Tokura Y., Seki S. (2018), Multiple- q noncollinear magnetism in an itinerant hexagonal magnet, in Science Advances, 4(11), eaau3402-eaau3402.
Negative-pressure-induced helimagnetism in ferromagnetic cubic perovskites Sr1−xBaxCoO3
Sakai H., Yokoyama S., Kuwabara A., White J. S., Canévet E., Rønnow H. M., Koretsune T., Arita R., Miyake A., Tokunaga M., Tokura Y., Ishiwata S. (2018), Negative-pressure-induced helimagnetism in ferromagnetic cubic perovskites Sr1−xBaxCoO3, in Physical Review Materials, 2(10), 104412-104412.
Controlling the helicity of magnetic skyrmions in a β -Mn-type high-temperature chiral magnet
Karube K., Shibata K., White J. S., Koretsune T., Yu X. Z., Tokunaga Y., Rønnow H. M., Arita R., Arima T., Tokura Y., Taguchi Y. (2018), Controlling the helicity of magnetic skyrmions in a β -Mn-type high-temperature chiral magnet, in Physical Review B, 98(15), 155120-155120.
Role of gallium diffusion in the formation of a magnetically dead layer at the Y3Fe5O12/Gd3Ga5O12 epitaxial interface
Suturin S. M., Korovin A. M., Bursian V. E., Lutsev L. V., Bourobina V., Yakovlev N. L., Montecchi M., Pasquali L., Ukleev V., Vorobiev A., Devishvili A., Sokolov N. S. (2018), Role of gallium diffusion in the formation of a magnetically dead layer at the Y3Fe5O12/Gd3Ga5O12 epitaxial interface, in Physical Review Materials, 2(10), 104404-104404.
Disordered skyrmion phase stabilized by magnetic frustration in a chiral magnet
Karube Kosuke, White Jonathan S., Morikawa Daisuke, Dewhurst Charles D., Cubitt Robert, Kikkawa Akiko, Yu Xiuzhen, Tokunaga Yusuke, Arima Taka-hisa, Rønnow Henrik M., Tokura Yoshinori, Taguchi Yasujiro (2018), Disordered skyrmion phase stabilized by magnetic frustration in a chiral magnet, in Science Advances, 4(9), eaar7043-eaar7043.
Electric-Field-Driven Topological Phase Switching and Skyrmion-Lattice Metastability in Magnetoelectric Cu2OSeO3
White J. S., Živković I., Kruchkov A. J., Bartkowiak M., Magrez A., Rønnow H. M. (2018), Electric-Field-Driven Topological Phase Switching and Skyrmion-Lattice Metastability in Magnetoelectric Cu2OSeO3, in Physical Review Applied, 10(1), 014021-014021.
Observation of end-vortex nucleation in individual ferromagnetic nanotubes
Mehlin A., Gross B., Wyss M., Schefer T., Tütüncüoglu G., Heimbach F., Fontcuberta i Morral A., Grundler D., Poggio M. (2018), Observation of end-vortex nucleation in individual ferromagnetic nanotubes, in Physical Review B, (13), 134422-134422.
Magnetic Field Control of Cycloidal Domains and Electric Polarization in Multiferroic BiFeO3
Bordács S., Farkas D.G., White J. S., Cubitt R., DeBeer-Schmitt L., Ito T., Kézsmárki I. (2018), Magnetic Field Control of Cycloidal Domains and Electric Polarization in Multiferroic BiFeO3, in Physical Review Letters, 120(14), 147203-147203.
Laser-Induced Skyrmion Writing and Erasing in an Ultrafast Cryo-Lorentz Transmission Electron Microscope
Berruto G., Madan I., Murooka Y., Vanacore G. M., Pomarico E., Rajeswari J., Lamb R., Huang P., Kruchkov A. J., Togawa Y., LaGrange T., McGrouther D., Rønnow H. M., Carbone F. (2018), Laser-Induced Skyrmion Writing and Erasing in an Ultrafast Cryo-Lorentz Transmission Electron Microscope, in Physical Review Letters, 120(11), 117201-117201.
Low-Field Bi-Skyrmion Formation in a Noncentrosymmetric Chimney Ladder Ferromagnet
Takagi R., Yu X. Z., White J. S., Shibata K., Kaneko Y., Tatara G., Rønnow H. M., Tokura Y., Seki S. (2018), Low-Field Bi-Skyrmion Formation in a Noncentrosymmetric Chimney Ladder Ferromagnet, in Physical Review Letters, 120(3), 037203-037203.
Topological spin-hedgehog crystals of a chiral magnet as engineered with magnetic anisotropy
Kanazawa N., White J. S., Rønnow H. M., Dewhurst C. D., Morikawa D., Shibata K., Arima T., Kagawa F., Tsukazaki A., Kozuka Y., Ichikawa M., Kawasaki M., Tokura Y. (2017), Topological spin-hedgehog crystals of a chiral magnet as engineered with magnetic anisotropy, in Physical Review B, 96(22), 220414-220414.
Skyrmion formation in a bulk chiral magnet at zero magnetic field and above room temperature
Karube K., White J. S., Morikawa D., Bartkowiak M., Kikkawa A., Tokunaga Y., Arima T., Rønnow H. M., Tokura Y., Taguchi Y. (2017), Skyrmion formation in a bulk chiral magnet at zero magnetic field and above room temperature, in Physical Review Materials, 1(7), 074405-074405.
Collective spin excitations of helices and magnetic skyrmions: review and perspectives of magnonics in non-centrosymmetric magnets
Garst Markus, Waizner Johannes, Grundler Dirk (2017), Collective spin excitations of helices and magnetic skyrmions: review and perspectives of magnonics in non-centrosymmetric magnets, in Journal of Physics D: Applied Physics, 50(29), 293002-293002.

Datasets

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/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. We acknowledge the financial support from the Swiss National Science Foundation(SNSF) via sinergia project NanoSkyrmionics CRSII5 171003 and Grant No. 163016 as well as Deutsche Forschungsgemeinschaft via grant DU 1427/2-1.Paper abstract:Exchange magnons are essential for unprecedented miniaturization of GHz electronics and magnon-based logic. However, their efficient excitation via microwave fields is still a challenge. Current methods including nanocontacts and grating couplers require advanced nanofabrication tools which limit the broad usage. Here we report efficient emission and detection of exchange magnons using micron-sized coplanar waveguides (CPWs) into which we integrated ferromagnetic(m) layers. We excited magnons in a broad frequency band with wavelengths λ down to 100 nm propagating over macroscopic distances in thin yttrium iron garnet. Applying time- and spatially resolved Brillouin light scattering as well as micromagnetic simulations we evidence a significant wavelength conversion process near mCPWs via tunable inhomogeneous fields. We argue that optimized mCPWs form microwave-to-magnon transducers providing phase-coherent exchange magnons with down to below 40 nm. Without any nanofabrication they allow one to harvest the advantages of nanomagnonics by antenna designs exploited in conventional microwave circuits.

Collaboration

Group / person Country
Types of collaboration
Experimentalphysik IV, Prof. M. Albrecht, Universität Augsburg Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
Magneto-optical Spectroscopy Group/Budapest University of Technology and Economics Hungary (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Theoretical Solid State Physics, TU Dresden, PD Dr. Markus Garst Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Physik-Dep. E51, Prof. C. Pfleiderer, TU Muenchen, Germany Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Fert Beijing institute and Spintronics interdisciplinary center China (Asia)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Exchange of personnel
University of Wisconsin, Chemistry Department United States of America (North America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Center for Emergent Matter Science (CEMS)/RIKEN Japan (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
Topology in Magnetism: Theory Meets Experiments 2019 Talk given at a conference High-throughput computational search of novel topological materials (speaker: O. Yazyev) 22.10.2019 La Plata, Argentina White Jonathan; Ukleev Victor; Yazyev Oleg;
FullProf School 2019 Poster Magnetic Skyrmions in Insulating Nanostructures 21.10.2019 Grenoble, France Baral Priya Ranjan;
Joint Annual Meeting of SPS and ÖPG 2019 Talk given at a conference Field-induced skyrmion inversion in the room-temperature chiral magnet Co9Zn9Mn2 29.08.2019 Zürich, Switzerland Ukleev Victor; Yazyev Oleg;
Swiss Physical Society (SPS) Joint Annual Meeting 2019 Talk given at a conference Bulk Magnon Modes in Cu2OSeO3 Detected by Brillouin Light Scattering Microscopy at Low Temperature and further contributions 26.08.2019 Zurich, Switzerland White Jonathan; Baral Priya Ranjan; Kukulova Anna; Che Ping; Yazyev Oleg;
JEMS 10th 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 Talk given at a conference On-chip emission and detection of short-wave magnons: from conversion to spin textures and grating couplers 28.07.2019 Carovigno, Italy Grundler Dirk; Che Ping;
19th International Conference on Crystal Growth and Epitaxy (ICCGE-19) Talk given at a conference Skyrmion Hosting Cu2OSeO3 Nanostructures (speaker: A. Magrez) 28.07.2019 Colorado, United States of America Baral Priya Ranjan;
Advances in Functional Materials (AFM) Conference Talk given at a conference Growing Skyrmionic Cu2OSeO3 Crystals: From Macro to Nanostructures (speaker: A. Magrez) 22.07.2019 Washington, United States of America Baral Priya Ranjan;
V International Workshop Dzyaloshinskii-Moriya Interaction and Exotic Spin Structures 2019 Talk given at a conference Soft x-ray spectroscopy, scattering and imaging studies of skyrmion-hosting compound Co8Zn8Mn4 09.07.2019 Petrozavodsk, Russia Ukleev Victor;
Gorden Research Seminar/Conference - Spin Dynamics in Nanostructures Poster Ultrafast LTEM studies on GHz dynamics of the Skyrmion lattice 06.07.2019 Les Diablerets, Switzerland Yu Le;
European Conference on Neutron Scattering 2019 Talk given at a conference Complementary study of magnetic frustration in Co7Zn7Mn6 chiral magnet by muons, neutrons and x-rays 05.07.2019 Saint-Petersburg, Russia Ukleev Victor;
European Conference on Neutron Scattering 2019 Talk given at a conference Multiple-q noncollinear magnetism in the itinerant hexagonal magnet Y3Co8Sn4 30.06.2019 St. Petersburg, Russia White Jonathan;
European Conference on Neutron Scattering 2019 Poster Disordered skyrmion phase stabilized by magnetic frustration in a chiral magnet 30.06.2019 St. Petersburg, Russia White Jonathan;
SolSkyMag 2019, International Conference Magnetism & Spintronics Talk given at a conference Spatially resolved magnon modes in artificial crystals and quasi-crystals 24.06.2019 San Sebastian, Spain Grundler Dirk;
PETRA III P09 XMCD User Workshop Talk given at a conference Coherent charge and magnetic ordering in Ho/Y superlattice revealed by element- selective x-ray scattering 03.06.2019 DESY, Hamburg, Germany, Germany Ukleev Victor;
European Materials Research Society (E-MRS) Spring meeting 2019 Individual talk High-throughput computational search for novel topological materials 27.05.2019 Nice, France Yazyev Oleg;
Joint French-Swedish school on X-rays and Neutrons techniques for the study of functional materials for energy Individual talk Application of scattering techniques for the study of skyrmionics 13.05.2019 Lund, Sweden White Jonathan;
American physical society March meeting Talk given at a conference Spin-orbit coupled ground state of mixed valence iridate Ba5AlIr2O11 04.03.2019 Boston, MA, United States of America Katukuri Vamshi Mohan;
XV Winter school in theoretical physics “Complex systems and prospective materials” Talk given at a conference Search for novel topological materials 28.01.2019 Dubna, Russia Yazyev Oleg;
Global Young Scientists Summit 2019 Poster Magnetic skyrmions in insulating nanostructures 20.01.2019 Singapore, Singapore Baral Priya Ranjan;
Invited seminar at KIIT Individual talk Magnetic Skyrmions: an introduction 18.01.2019 Bhubaneswar, India Baral Priya Ranjan;
EDMX Research Day 2018 Poster VAN DER WAALS GROWTH OF NEAR ROOM-TEMPERATURE SKYRMION-HOSTING THIN FILMS & NANOSTRUCTURES plus a further contribution 12.12.2018 Lausanne, Switzerland Grundler Dirk; Che Ping; Kukulova Anna;
Correlated electrons in Transition-Metal compounds: New challenges Poster Spin-orbit coupled ground state of mixed valence iridate Ba5AlIr2O11 05.11.2018 Dresden, Germany Katukuri Vamshi Mohan;
2018 Frontiers Forum on Quantum, Energy and Materials (QEM) Talk given at a conference High-throughput search for novel topological materials 11.10.2018 Chengdu, China Yazyev Oleg;
The Conference on Neutron Scattering in Condensed Matter NSCM-2018 Talk given at a conference Intermediate phases at ε-Fe2O3/GaN and ε-Fe2O3/MgO interfaces 17.09.2018 St. Petersburg, Russia Ukleev Victor;
New generation in strongly correlated electrons systems Talk given at a conference Spin-orbit coupling and electronic correlations in Lacunar spinel cluster magnets — a quantum chemistry investigation 03.09.2018 San Sebastian/Donostia, Spain Katukuri Vamshi Mohan;
9th Joint European Magnetic Symposia (JEMS) Conference 2018 Talk given at a conference Nanometer-scale magnetic field imaging with a scanning SQUID-on-tip 03.09.2018 Mainz, Germany Romagnoli Giulio;
Joint European Magnetic Symposia (JEMS) 2018 Talk given at a conference Polymorphism of the low-temperature metastable magnetic states in a strained FeGe lamella 03.09.2018 Mainz, Germany Ukleev Victor;
Swiss physical society meeting 2018, session "Advances in Topological materials" Talk given at a conference Non-trivial band topology in high pressure structure of Ba3CaIr2O9 28.08.2018 Lausanne, Switzerland Katukuri Vamshi Mohan;
New Trends in Chiral Magnetism Summer School 2018 NTCM2018 Talk given at a conference Broadband spin-wave spectroscopy at microwave frequencies – from fundamentals to chiral magnets; plus further contributions 19.08.2018 Lausanne, Switzerland White Jonathan; Poggio Martino; Grundler Dirk; Yazyev Oleg;
The International Conference on Magnetism (ICM) Talk given at a conference Magnetization configurations and reversal of individual ferromagnetic nanotubes 15.07.2018 San Francisco, United States of America Poggio Martino;
International Symposium on Materials Design & 14th USPEX Workshop Talk given at a conference High-throughput search for novel topological materials 24.06.2018 Tianjin, China Yazyev Oleg;
Séminaires "Magnétisme non conventionnel", Institut Néel Individual talk Disordered skyrmion phase stabilized by magnetic frustration in a chiral magnet 21.06.2018 Institut Néel, France White Jonathan;
International Conference on Magnetism & Spintronics (SOL-SkyMag 2019) Talk given at a conference Skyrmion phase stability in FeGe nanowires 18.06.2018 San Sebastian, Spain Philipp Simon;
EPFL Physics Seminar Individual talk New Scanning Probes for Nanomagnetic Imaging 18.05.2018 Lausanne, Switzerland Poggio Martino;
Condensed Matter Physics (CMP) Seminar, Durham University Individual talk Disordered skyrmion phase stabilised by magnetic frustration in a chiral magnet 16.05.2018 Durham University, Great Britain and Northern Ireland White Jonathan;
Seminar, Laboratory for Advanced Microscopies, University of Zaragoza Individual talk Mechanical sensing of nanomagnetic systems 08.05.2018 Zaragoza, Spain Poggio Martino;
MicroNanoFabrication Annual Review Meeting - CMi 2018 Poster SPIN WAVE PROPAGATIONS IN INSULTING FERRIMAGNETIC STRIPES 08.05.2018 Lausanne, Switzerland Che Ping; Kukulova Anna; Grundler Dirk;
“Technologies for Oxide Electronics” School Talk given at a conference Magnonics for logics and other applications: opportunities for oxide-based microwave technologies - fundamentals and material's aspects 15.03.2018 Sant Feliu, Spain Grundler Dirk;
Spin mechanics 5 & Nano-MRI 6 Talk given at a conference Nanomechanics and nanomagnetism 11.02.2018 Chamonix, France Poggio Martino;
Opto- and Nanomechanics Research Group (MecaQ) Annual Meeting Talk given at a conference Mechanical sensing of nanomagnetic systems 13.12.2017 Paris, France Poggio Martino;
Physics Department Seminar, University of Augsburg Individual talk Mechanical sensing of nanomagnetic systems 05.12.2017 Augsburg, Germany Poggio Martino;


Self-organised

Title Date Place
Swiss physical society meeting 2018, session "Advances in Topological Materials" 28.08.2018 Lausanne, Switzerland
Young Researchers’ Workshop, May 2018 24.05.2018 Villigen, Switzerland

Knowledge transfer events

Active participation

Title Type of contribution Date Place Persons involved
Magnetic nanostructures for information technology Performances, exhibitions (e.g. for education institutions) 14.11.2019 Lausanne, Switzerland Kukulova Anna;
Open House Days - EPFL Performances, exhibitions (e.g. for education institutions) 14.09.2019 Lausanne, Switzerland Baral Priya Ranjan; Kukulova Anna; Grundler Dirk; Yu Le; Che Ping;


Communication with the public

Communication Title Media Place Year
Media relations: print media, online media Magnetic Skyrmions: From Fundamental Physics to Topological Electronics Progress in Physics (73), SPG Mitteilungen Nr. 60 German-speaking Switzerland International Western Switzerland Italian-speaking Switzerland Rhaeto-Romanic Switzerland 2020
Talks/events/exhibitions Interactive presentation of sinergia research/Open House Days-EPFL Western Switzerland 2019
Talks/events/exhibitions Magnetic nanostructures for information technology Western Switzerland 2019
Talks/events/exhibitions Talk at Swiss Young Physicists’ Tournament, University of Basel, Switzerland German-speaking Switzerland Italian-speaking Switzerland Rhaeto-Romanic Switzerland Western Switzerland 2018
Talks/events/exhibitions Open house activity at LMGN laboratory Western Switzerland 2017
Talks/events/exhibitions TecDay, Liceo Cantonale di Lugano 1, Lugano, Switzerland Italian-speaking Switzerland 2017

Associated projects

Number Title Start Funding scheme
153451 Exploration of emerging magnetoelectric coupling effects in new materials 01.07.2015 Project funding (Div. I-III)
140478 Spin, Quantum Electronics, and Nanomechanics 01.04.2012 Project funding (Div. I-III)
189644 Versatile high sensitivity and throughput magnetometer for quantum, functional and applied materials 01.03.2020 R'EQUIP
178863 New Scanning Probes for Nanomagnetic Imaging 01.04.2018 Project funding (Div. I-III)
172543 Electronic transport in complex graphene nanostructures 01.04.2018 Project funding (Div. I-III)

Abstract

Magnetic Skyrmions are particle-like spin textures. They exhibit nanoscale dimensions and can be persistent due to topological protection. These nanoobjects have been first discovered at low temperatures in a small number of bulk single crystals of high purity and quality. Such chiral magnets are now of substantial interest for both fundamental condensed matter physics due to topological effects and applied sciences such as spintronics. The physics and manipulation of Skyrmions stabilized by Dzyaloshinskii-Moriya interaction (DMI) are relatively well established in bulk materials at low temperatures. The results promise novel device concepts in magnetic storage and information technology offering low power consumption. Technologically relevant structures will necessarily involve nanostructures operated at room temperature. The research on nanosystems is however mostly at the theoretical and numerical level because the relevant materials pose key challenges in the synthesis and fabrication of strain-free thin films that support the Skyrmion phase. Despite strong efforts, Skyrmions at room temperature have been observed only very recently in metallic ultrathin films and the bulk metallic alloy CoZnMn. Corresponding semiconductors and insulators that will decisively enhance the technological impact remain to be discovered.In this proposal we aim to go beyond the state-of-the-art of existing Skyrmionic schemes in that we intend to:-Systematically search for novel metallic, semiconducting, and insulating materials hosting Skyrmions at high temperatures-Achieve strain-free thin films and free-standing nanostructures with volume-DMI for Skyrmion-based devices -Image and manipulate Skyrmions up to the microwave frequency regime and down to the single Skyrmion level to set the base for Nanoskyrmionics.These ambitious goals can be achieved only by intimately combining different disciplines at their highest level and from diverse areas of research. In our proposal, we combine: computational materials discovery in condensed matter physics, chemical synthesis and molecular beam epitaxy, state-of-the-art neutron diffraction, nanotechnology and GHz spectroscopy. We propose to implement chemical precipitation from a solution as well as van der Waals epitaxy for strain-free thin film deposition. Direct correlation between the materials nature (structure, chemical composition, disorder configuration) and physical properties (magnetization, Skyrmion structure, dynamics) will be achieved by applying new computational and nanosensing techniques. The interdisciplinary efforts and results will lead to a paradigm-shift by providing a clear microscopic picture of the role and potential of Skyrmions in engineering, setting the stage for Skyrmionic science and technology at room temperature.
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