Emergent and topological properties of 3D chiral gyroid nanostructures

• Project/Area Number: 21K04816
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 28020:Nanostructural physics-related
• Research Institution: Tohoku University
• Principal Investigator: LLANDRO Justin 東北大学, 電気通信研究所, 助教 (90784140)
• Project Period (FY): 2021-04-01 – 2023-03-31
• Project Status: Discontinued (Fiscal Year 2022)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2022: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: gyroids / spin waves / spin transport / topology / chiral / self-assembly / PXCT / 3D nanomagnetism / gyroid / spin wave

Outline of Research at the Start

Networks of nanostructures can acquire new, emergent properties which arise from the topology of the network. This project aims to study magnetic gyroids, 3D networks of nanoscale helices, which combine topology with magnetism to open new possibilities for spintronics and novel computing paradigms.

Outline of Annual Research Achievements

This study aims to investigate the influence of morphology on magnetism and spin transport in 3D nanoscale networks. We clarified that Ni gyroids, composed of chiral 3-connected nodes, behave as frustrated networks of non-collinear, non-Ising macrospins with highly orientation-dependent magnetoresistance. We successfully demonstrated that Ni gyroids exhibit both strongly anisotropic spin-wave transport and potential localisation of spin waves. Using X-ray nanotomography, we succeeded in imaging in 3D samples fabricated by self-assembly of both gyroids and achiral, 4-connected single-diamond networks, quantifying the distortion of the network during self-assembly and for the first time revealing extended liquid-crystal-like topological defects. These results are expected to lead to new ways to design and control collective and topological effects via morphology control in magnetic networks for spintronics and unconventional computing applications.

Research Products

• [Int'l Joint Research] Technical University of Kaiserslautern(ドイツ)
• [Int'l Joint Research] Adolphe Merkle Institute (AMI)/Paul Scherrer Institute (PSI)(スイス)
• [Int'l Joint Research] Universite de Strasbourg/European Synchrotron Radiation Facility(フランス)
• [Int'l Joint Research] Adam Mickiewicz University (AMU)(ポーランド)
• [Int'l Joint Research] Cornell University(米国)
• [Int'l Joint Research] Technical University of Kaiserslautern(ドイツ)
• [Int'l Joint Research] Adolphe Merkle Institute (AMI)/Paul Scherrer Institute (PSI)(スイス)
• [Int'l Joint Research] European Synchrotron Radiation Facility(フランス)
• [Journal Article] Magnetic order in nanoscale gyroid networks (2023)
  • Author(s): Ami S. Koshikawa, Justin Llandro, Masayuki Ohzeki, Shunsuke Fukami, Hideo Ohno, Naemi Leo
  • Journal Title: arXiv Volume: -
  • Int'l Joint Research
• [Journal Article] X-ray nanotomography reveals formation of single diamonds by block copolymer self-assembly (2023)
  • Author(s): Kenza Djeghdi, Dmitry Karpov, S. Narjes Abdollahi, Karolina Godlewska, Mirko Holler, Claire Donnelly, Takeshi Yuasa, Hiroaki Sai, Ulrich B. Wiesner, Ullrich Steiner, Bodo D. Wilts, Michimasa Musya, Shunsuke Fukami, Hideo Ohno, Ana Diaz, Justin Llandro, Ilja Gunkel
  • Journal Title: arXiv Volume: -
  • Int'l Joint Research
• [Journal Article] High-resolution three-dimensional imaging of topological textures in single-diamond networks (2023)
  • Author(s): Dmitry Karpov, Kenza Djeghdi, Mirko Holler, S. Narjes Abdollahi, Karolina Godlewska, Claire Donnelly, Takeshi Yuasa, Hiroaki Sai, Ulrich B. Wiesner, Bodo D. Wilts, Ullrich Steiner, Michimasa Musya, Shunsuke Fukami, Hideo Ohno, Ilja Gunkel, Ana Diaz, Justin Llandro
  • Journal Title: arXiv Volume: -
  • Int'l Joint Research
• [Presentation] Morphology and magnetism in self-assembled 3D gyroid nanostructures (2023)
  • Author(s): J. Llandro
  • Organizer: 32nd Joint Inter-laboratory Workshop on Nano-magnetics (JIWON)
  • Int'l Joint Research / Invited
• [Presentation] Spin-Wave Dynamics in Ferromagnetic Gyroid Nanostructures (2023)
  • Author(s): M. Golebiewski, R. Hertel, V. Vasyuchka, P. Pirro, M. Krawczyk, J. Llandro
  • Organizer: Intermag 2023
  • Int'l Joint Research
• [Presentation] Gyroid Nanostructures in Magnonics (2023)
  • Author(s): M. Golebiewski, R. Hertel, V. Vasyuchka, P. Pirro, M. Krawczyk, J. Llandro
  • Organizer: Physics of Magnetism 2023 (PM’23)
  • Int'l Joint Research
• [Presentation] Ferromagnetic Resonance in Gyroidal Networks (2023)
  • Author(s): M. Golebiewski, R. Hertel, V. Vasyuchka, P. Pirro, M. Krawczyk, J. Llandro
  • Organizer: 2023 Joint European Magnetic Symposia (JEMS 2023)
  • Int'l Joint Research
• [Presentation] Discovery of single diamond networks in block copolymer films by nanotomography (2022)
  • Author(s): K. Djeghdi, K. Godlewska, D. Karpov, J. Llandro, B.D. Wilts, U. Wiesner, U. Steiner, I. Gunkel
  • Organizer: 2022 Congress of the European Polymer Federation (EPF22)
  • Int'l Joint Research
• [Presentation] Morphology and properties of self-organized 3D gyroid nanostructures (2022)
  • Author(s): J. Llandro
  • Organizer: IMEC Symposium on 'Magnetic Materials for Spintronics'
  • Int'l Joint Research / Invited
• [Presentation] Geometrical and Magnetic Configuration of Self-organized 3D Gyroid Nanostructures (2021)
  • Author(s): J. Llandro, D. M. Love, A. Kovacs, J. Caron, K. N. Vyas, A. Kakay, M. R. J. Scherer, U. Steiner, C. H. W. Barnes, R. E. Dunin-Borkowski, J. Fassbender, S. Fukami, H. Ohno
  • Organizer: Highly Frustrated Magnetism Virtual School and Conference (wHFM21)
  • Int'l Joint Research
• [Presentation] Intricate Magnetic Configuration of 3D Nanoscale Gyroid Networks (2021)
  • Author(s): J. Llandro, D. M. Love, A. Kovacs, J. Caron, K. N. Vyas, A. Kakay, M. R. J. Scherer, U. Steiner, C. H. W. Barnes, R. E. Dunin-Borkowski, J. Fassbender, S. Fukami, H. Ohno
  • Organizer: The 4th International Symposium for The Core Research Cluster for Spintronics
  • Invited
• [Presentation] Small-angle neutron scattering of nanomagnetic gyroid structures (2021)
  • Author(s): N. Leo, A. S. Koshikawa, J. Llandro
  • Organizer: WE-Heraeus Seminar on “Magnetic Small Angle Neutron Scattering - from Nanoscale Magnetism to Long-Range Magnetic Structures”
  • Int'l Joint Research
• [Presentation] Intricate Magnetic Configuration of Self-assembled 3D Gyroid Nanostructures (2021)
  • Author(s): J. Llandro, D. M. Love, A. Kovacs, J. Caron, K. N. Vyas, A. Kakay, M. R. J. Scherer, U. Steiner, C. H. W. Barnes, R. E. Dunin-Borkowski, J. Fassbender, S. Fukami, H. Ohno
  • Organizer: WE-Heraeus Seminar on “Curvilinear Condensed Matter: Fundamentals and Applications”
  • Int'l Joint Research
• [Presentation] Small-angle neutron scattering of nanomagnetic gyroid structures (2021)
  • Author(s): N. Leo, A. S. Koshikawa, J. Llandro
  • Organizer: WE-Heraeus Seminar on “Curvilinear Condensed Matter: Fundamentals and Applications”
  • Int'l Joint Research
• [Presentation] Burning cups and donuts: what coherent X-rays can reveal about topological defects (2021)
  • Author(s): D. Karpov, J. Llandro, E. Fohtung
  • Organizer: IUCR-XXV
  • Int'l Joint Research