Curved Three-Dimensional Cobalt Nanohelices for Use in Domain Wall Device Applications

Charudatta Phatak; Christina S. Miller; Zachary Thompson; Emine Begum Gulsoy; Amanda K. Petford-Long

doi:10.1021/acsanm.0c01228

Curved Three-Dimensional Cobalt Nanohelices for Use in Domain Wall Device Applications

Charudatta Phatak^*, Christina S. Miller, Zachary Thompson, Emine Begum Gulsoy, Amanda K. Petford-Long

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Three-dimensional fabrication of nanostructures opens unique possibilities to understand not only the fundamental effects of the shape of and interactions between the nanostructures but also technological applications. This is of particular importance for magnetic nanostructures, where curvilinear geometry can lead to the emergence of topological effects and spin excitations. In this work, we used the focused electron beam ion deposition (FEBID) method to fabricate three-dimensional magnetic cobalt nanohelices with controlled geometry such as chirality and curvature. Using a combination of off-axis electron holography and electron tomography, we are able to determine the way in which the quantitative nanoscale magnetization distribution is related to the 3D morphology and curvature of the nanohelices. These results pave a way forward for development of future 3D magnetic nanostructures to explore novel physics as well as for applications based on domain walls such as magnetic memory and magnetic field sensors.

Original language	English (US)
Pages (from-to)	6009-6016
Number of pages	8
Journal	ACS Applied Nano Materials
Volume	3
Issue number	6
DOIs	https://doi.org/10.1021/acsanm.0c01228
State	Published - Jun 26 2020

Keywords

3D nanofabrication
FEBID
cobalt nanostructures
curved magnetic nanostructures
direct write
electron tomography
nanomagnetism
off-axis electron holography

ASJC Scopus subject areas

Materials Science(all)

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10.1021/acsanm.0c01228

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@article{3f99ec0a1ab9471280731f18d774d54c,

title = "Curved Three-Dimensional Cobalt Nanohelices for Use in Domain Wall Device Applications",

abstract = "Three-dimensional fabrication of nanostructures opens unique possibilities to understand not only the fundamental effects of the shape of and interactions between the nanostructures but also technological applications. This is of particular importance for magnetic nanostructures, where curvilinear geometry can lead to the emergence of topological effects and spin excitations. In this work, we used the focused electron beam ion deposition (FEBID) method to fabricate three-dimensional magnetic cobalt nanohelices with controlled geometry such as chirality and curvature. Using a combination of off-axis electron holography and electron tomography, we are able to determine the way in which the quantitative nanoscale magnetization distribution is related to the 3D morphology and curvature of the nanohelices. These results pave a way forward for development of future 3D magnetic nanostructures to explore novel physics as well as for applications based on domain walls such as magnetic memory and magnetic field sensors. ",

keywords = "3D nanofabrication, FEBID, cobalt nanostructures, curved magnetic nanostructures, direct write, electron tomography, nanomagnetism, off-axis electron holography",

author = "Charudatta Phatak and Miller, {Christina S.} and Zachary Thompson and Gulsoy, {Emine Begum} and Petford-Long, {Amanda K.}",

note = "Funding Information: Work by C.P. and A.K.P.-L. (sample fabrication, tomography, and data analysis) was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division. This work was performed, in part (C.S.M.), at the Center for Nanoscale Materials, a U.S. Department of Energy Office of Science User Facility, and supported by the U.S. Department of Energy, Office of Science, under Contract DE-AC02-06CH11357. E.B.G. (tomography data analysis) acknowledges financial assistance via award 70NANB19H005 from the U.S. Department of Commerce, National Institute of Standards and Technology, as part of the Center for Hierarchical Materials Design (CHiMaD). Work by Z.T. (surface curvature calculations) was sponsored by the National Aeronautics and Space Administration under Grant NNX16AR13G. Publisher Copyright: Copyright {\textcopyright} 2020 American Chemical Society.",

year = "2020",

month = jun,

day = "26",

doi = "10.1021/acsanm.0c01228",

language = "English (US)",

volume = "3",

pages = "6009--6016",

journal = "ACS Applied Nano Materials",

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publisher = "American Chemical Society",

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AU - Phatak, Charudatta

AU - Miller, Christina S.

AU - Thompson, Zachary

AU - Gulsoy, Emine Begum

AU - Petford-Long, Amanda K.

N1 - Funding Information: Work by C.P. and A.K.P.-L. (sample fabrication, tomography, and data analysis) was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division. This work was performed, in part (C.S.M.), at the Center for Nanoscale Materials, a U.S. Department of Energy Office of Science User Facility, and supported by the U.S. Department of Energy, Office of Science, under Contract DE-AC02-06CH11357. E.B.G. (tomography data analysis) acknowledges financial assistance via award 70NANB19H005 from the U.S. Department of Commerce, National Institute of Standards and Technology, as part of the Center for Hierarchical Materials Design (CHiMaD). Work by Z.T. (surface curvature calculations) was sponsored by the National Aeronautics and Space Administration under Grant NNX16AR13G. Publisher Copyright: Copyright © 2020 American Chemical Society.

PY - 2020/6/26

Y1 - 2020/6/26

N2 - Three-dimensional fabrication of nanostructures opens unique possibilities to understand not only the fundamental effects of the shape of and interactions between the nanostructures but also technological applications. This is of particular importance for magnetic nanostructures, where curvilinear geometry can lead to the emergence of topological effects and spin excitations. In this work, we used the focused electron beam ion deposition (FEBID) method to fabricate three-dimensional magnetic cobalt nanohelices with controlled geometry such as chirality and curvature. Using a combination of off-axis electron holography and electron tomography, we are able to determine the way in which the quantitative nanoscale magnetization distribution is related to the 3D morphology and curvature of the nanohelices. These results pave a way forward for development of future 3D magnetic nanostructures to explore novel physics as well as for applications based on domain walls such as magnetic memory and magnetic field sensors.

AB - Three-dimensional fabrication of nanostructures opens unique possibilities to understand not only the fundamental effects of the shape of and interactions between the nanostructures but also technological applications. This is of particular importance for magnetic nanostructures, where curvilinear geometry can lead to the emergence of topological effects and spin excitations. In this work, we used the focused electron beam ion deposition (FEBID) method to fabricate three-dimensional magnetic cobalt nanohelices with controlled geometry such as chirality and curvature. Using a combination of off-axis electron holography and electron tomography, we are able to determine the way in which the quantitative nanoscale magnetization distribution is related to the 3D morphology and curvature of the nanohelices. These results pave a way forward for development of future 3D magnetic nanostructures to explore novel physics as well as for applications based on domain walls such as magnetic memory and magnetic field sensors.

KW - 3D nanofabrication

KW - FEBID

KW - cobalt nanostructures

KW - curved magnetic nanostructures

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KW - nanomagnetism

KW - off-axis electron holography

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JO - ACS Applied Nano Materials

JF - ACS Applied Nano Materials

IS - 6

ER -

Curved Three-Dimensional Cobalt Nanohelices for Use in Domain Wall Device Applications

Abstract

Keywords

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