This title appears in the Scientific Report :
2020
Please use the identifier:
http://dx.doi.org/10.1021/acs.nanolett.0c00578 in citations.
Please use the identifier: http://hdl.handle.net/2128/25634 in citations.
Visualizing Magnetic Structure in 3D Nanoscale Ni–Fe Gyroid Networks
Visualizing Magnetic Structure in 3D Nanoscale Ni–Fe Gyroid Networks
Arrays of interacting 2D nanomagnets display unprecedented electromagnetic properties via collective effects, demonstrated in artificial spin ices and magnonic crystals. Progress toward 3D magnetic metamaterials is hampered by two challenges: fabricating 3D structures near intrinsic magnetic length...
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Personal Name(s): | Llandro, Justin (Corresponding author) |
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Love, David M. / Kovács, András / Caron, Jan / Vyas, Kunal N. / Kákay, Attila / Salikhov, Ruslan / Lenz, Kilian / Fassbender, Jürgen / Scherer, Maik R. J. / Cimorra, Christian / Steiner, Ullrich / Barnes, Crispin H. W. / Dunin-Borkowski, Rafal E. / Fukami, Shunsuke / Ohno, Hideo | |
Contributing Institute: |
Physik Nanoskaliger Systeme; ER-C-1 |
Published in: | Nano letters, 20 (2020) 5, S. 3642 - 3650 |
Imprint: |
Washington, DC
ACS Publ.
2020
|
PubMed ID: |
32250635 |
DOI: |
10.1021/acs.nanolett.0c00578 |
Document Type: |
Journal Article |
Research Program: |
Imaging Magnetism in Nanostructures using Electron Holography Three-dimensional magnetization textures: Discovery and control on the nanoscale Controlling Configuration-Based Phenomena |
Link: |
Published on 2020-04-06. Available in OpenAccess from 2021-04-06. Published on 2020-04-06. Available in OpenAccess from 2021-04-06. |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/25634 in citations.
Arrays of interacting 2D nanomagnets display unprecedented electromagnetic properties via collective effects, demonstrated in artificial spin ices and magnonic crystals. Progress toward 3D magnetic metamaterials is hampered by two challenges: fabricating 3D structures near intrinsic magnetic length scales (sub-100 nm) and visualizing their magnetic configurations. Here, we fabricate and measure nanoscale magnetic gyroids, periodic chiral networks comprising nanowire-like struts forming three-connected vertices. Via block copolymer templating, we produce Ni75Fe25 single-gyroid and double-gyroid (an inversion pair of single-gyroids) nanostructures with a 42 nm unit cell and 11 nm diameter struts, comparable to the exchange length in Ni–Fe. We visualize their magnetization distributions via off-axis electron holography with nanometer spatial resolution and interpret the patterns using finite-element micromagnetic simulations. Our results suggest an intricate, frustrated remanent state which is ferromagnetic but without a unique equilibrium configuration, opening new possibilities for collective phenomena in magnetism, including 3D magnonic crystals and unconventional computing. |