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000878263 1001_ $$00000-0002-1362-6083$$aLlandro, Justin$$b0$$eCorresponding author
000878263 245__ $$aVisualizing Magnetic Structure in 3D Nanoscale Ni–Fe Gyroid Networks
000878263 260__ $$aWashington, DC$$bACS Publ.$$c2020
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000878263 520__ $$aArrays of interacting 2D nanomagnets display unprecedented electromagnetic properties via collective effects, demonstrated in artificial spin ices and magnonic crystals. Progress toward 3D magnetic metamaterials is hampered by two challenges: fabricating 3D structures near intrinsic magnetic length scales (sub-100 nm) and visualizing their magnetic configurations. Here, we fabricate and measure nanoscale magnetic gyroids, periodic chiral networks comprising nanowire-like struts forming three-connected vertices. Via block copolymer templating, we produce Ni75Fe25 single-gyroid and double-gyroid (an inversion pair of single-gyroids) nanostructures with a 42 nm unit cell and 11 nm diameter struts, comparable to the exchange length in Ni–Fe. We visualize their magnetization distributions via off-axis electron holography with nanometer spatial resolution and interpret the patterns using finite-element micromagnetic simulations. Our results suggest an intricate, frustrated remanent state which is ferromagnetic but without a unique equilibrium configuration, opening new possibilities for collective phenomena in magnetism, including 3D magnonic crystals and unconventional computing.
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000878263 536__ $$0G:(EU-Grant)856538$$a3D MAGiC - Three-dimensional magnetization textures: Discovery and control on the nanoscale (856538)$$c856538$$fERC-2019-SyG$$x1
000878263 536__ $$0G:(EU-Grant)320832$$aIMAGINE - Imaging Magnetism in Nanostructures using Electron Holography (320832)$$c320832$$fERC-2012-ADG_20120216$$x2
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000878263 7001_ $$0P:(DE-HGF)0$$aLove, David M.$$b1
000878263 7001_ $$0P:(DE-Juel1)144926$$aKovács, András$$b2$$ufzj
000878263 7001_ $$0P:(DE-Juel1)157760$$aCaron, Jan$$b3$$ufzj
000878263 7001_ $$0P:(DE-HGF)0$$aVyas, Kunal N.$$b4
000878263 7001_ $$0P:(DE-Juel1)130747$$aKákay, Attila$$b5
000878263 7001_ $$0P:(DE-HGF)0$$aSalikhov, Ruslan$$b6
000878263 7001_ $$0P:(DE-HGF)0$$aLenz, Kilian$$b7
000878263 7001_ $$0P:(DE-HGF)0$$aFassbender, Jürgen$$b8
000878263 7001_ $$0P:(DE-HGF)0$$aScherer, Maik R. J.$$b9
000878263 7001_ $$0P:(DE-HGF)0$$aCimorra, Christian$$b10
000878263 7001_ $$00000-0001-5936-339X$$aSteiner, Ullrich$$b11
000878263 7001_ $$0P:(DE-HGF)0$$aBarnes, Crispin H. W.$$b12
000878263 7001_ $$0P:(DE-Juel1)144121$$aDunin-Borkowski, Rafal E.$$b13$$ufzj
000878263 7001_ $$0P:(DE-HGF)0$$aFukami, Shunsuke$$b14
000878263 7001_ $$0P:(DE-HGF)0$$aOhno, Hideo$$b15
000878263 773__ $$0PERI:(DE-600)2048866-X$$a10.1021/acs.nanolett.0c00578$$gVol. 20, no. 5, p. 3642 - 3650$$n5$$p3642 - 3650$$tNano letters$$v20$$x1530-6992$$y2020
000878263 8564_ $$uhttps://juser.fz-juelich.de/record/878263/files/GyroidEH_NanoLett_final_modified.pdf$$yPublished on 2020-04-06. Available in OpenAccess from 2021-04-06.
000878263 8564_ $$uhttps://juser.fz-juelich.de/record/878263/files/GyroidEH_NanoLett_final_modified.pdf?subformat=pdfa$$xpdfa$$yPublished on 2020-04-06. Available in OpenAccess from 2021-04-06.
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