Emergent and topological properties of 3D chiral gyroid nanostructures

3D 手性螺旋纳米结构的涌现和拓扑特性

• 批准号: 21K04816
• 负责人: LLANDRO Justin
• 金额: $ 2.66万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-04-01 至 2023-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21K04816/
• 关键词: gyroids; spin waves; spin transport; topology; chiral; self-assembly; PXCT; 3D nanomagnetism; gyroid; spin wave

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.

本研究旨在探讨三维纳米网络中形貌对磁性和自旋输运的影响。我们澄清了Ni陀螺，由手性3连接节点组成，表现为具有高度定向依赖磁电阻的非共线，非伊辛大自旋的受挫网络。我们成功地证明了Ni陀螺具有强各向异性自旋波输运和自旋波的潜在局域化。利用x射线纳米层析成像技术，我们成功地对自组装的陀螺仪和非手性4连接单金刚石网络制作的3D样品进行了成像，量化了自组装过程中网络的畸变，并首次揭示了扩展的液晶样拓扑缺陷。这些结果有望通过自旋电子学和非常规计算应用中的磁网络形态控制来设计和控制集体效应和拓扑效应。

项目成果

Intricate Magnetic Configuration of Self-assembled 3D Gyroid Nanostructures

自组装 3D 陀螺仪纳米结构的复杂磁性结构

• 发表时间: 2021
• 作者: 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
• 通讯作者: H. Ohno

Adolphe Merkle Institute (AMI)/Paul Scherrer Institute (PSI)(スイス)

阿道夫默克尔研究所 (AMI)/保罗谢勒研究所 (PSI)（瑞士）

Adam Mickiewicz University (AMU)(ポーランド)

亚当·密茨凯维奇大学 (AMU)（波兰）

X-ray nanotomography reveals formation of single diamonds by block copolymer self-assembly

• 发表时间: 2023-04
• 作者: Kenza Djeghdi;D. Karpov;N. Abdollahi;Karolina Godlewska;M. Holler;C. Donnelly;Takeshi Yuasa;Hiroaki Sai;Ulrich B Wiesner;U. Steiner;B. Wilts;Michimasa Musya;S. Fukami;H. Ohno;Ana Diaz;J. Llandro;I. Gunkel

European Synchrotron Radiation Facility(フランス)

欧洲同步辐射装置（法国）