Emergent and topological properties of 3D chiral gyroid nanostructures

2022 Fiscal Year Annual Research Report

• Project/Area Number: 21K04816
• 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
• Keywords: gyroids / spin waves / spin transport / topology / chiral / self-assembly / PXCT / 3D nanomagnetism

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)
  • Country Name: GERMANY
  • Counterpart Institution: Technical University of Kaiserslautern
• [Int'l Joint Research] Adolphe Merkle Institute (AMI)/Paul Scherrer Institute (PSI)(スイス)
  • Country Name: SWITZERLAND
  • Counterpart Institution: Adolphe Merkle Institute (AMI)/Paul Scherrer Institute (PSI)
• [Int'l Joint Research] Universite de Strasbourg/European Synchrotron Radiation Facility(フランス)
  • Country Name: FRANCE
  • Counterpart Institution: Universite de Strasbourg/European Synchrotron Radiation Facility
• [Int'l Joint Research] Adam Mickiewicz University (AMU)(ポーランド)
  • Country Name: POLAND
  • Counterpart Institution: Adam Mickiewicz University (AMU)
• [Int'l Joint Research] Cornell University(米国)
  • Country Name: U.S.A.
  • Counterpart Institution: Cornell University
• [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: - Pages: -
  • DOI: 10.48550/arXiv.2303.05816
  • 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: - Pages: -
  • DOI: 10.48550/arXiv.2304.12027
  • 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: - Pages: -
  • DOI: 10.48550/arXiv.2304.14819
  • 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