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@ARTICLE{Llandro:878263,
author = {Llandro, Justin and Love, David M. and Kovács, András and
Caron, Jan and Vyas, Kunal N. and Kákay, Attila and
Salikhov, Ruslan and Lenz, Kilian and Fassbender, Jürgen
and Scherer, Maik R. J. and Cimorra, Christian and Steiner,
Ullrich and Barnes, Crispin H. W. and Dunin-Borkowski, Rafal
E. and Fukami, Shunsuke and Ohno, Hideo},
title = {{V}isualizing {M}agnetic {S}tructure in 3{D} {N}anoscale
{N}i–{F}e {G}yroid {N}etworks},
journal = {Nano letters},
volume = {20},
number = {5},
issn = {1530-6992},
address = {Washington, DC},
publisher = {ACS Publ.},
reportid = {FZJ-2020-02732},
pages = {3642 - 3650},
year = {2020},
abstract = {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.},
cin = {ER-C-1},
ddc = {660},
cid = {I:(DE-Juel1)ER-C-1-20170209},
pnm = {143 - Controlling Configuration-Based Phenomena (POF3-143)
/ 3D MAGiC - Three-dimensional magnetization textures:
Discovery and control on the nanoscale (856538) / IMAGINE -
Imaging Magnetism in Nanostructures using Electron
Holography (320832)},
pid = {G:(DE-HGF)POF3-143 / G:(EU-Grant)856538 /
G:(EU-Grant)320832},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:32250635},
UT = {WOS:000535255300092},
doi = {10.1021/acs.nanolett.0c00578},
url = {https://juser.fz-juelich.de/record/878263},
}