Design of intense nanoscale stray fields and gradients at magnetic nanorod interfaces

Yurii P. Ivanov; Jonathan Leliaert; Adrian Crespo; Matteo Pancaldi; Christopher Tollan; Jürgen Kosel; Andrey Chuvilin; Paolo Vavassori

doi:10.1021/acsami.8b19873

Design of intense nanoscale stray fields and gradients at magnetic nanorod interfaces

Yurii P. Ivanov, Jonathan Leliaert, Adrian Crespo, Matteo Pancaldi, Christopher Tollan, Jürgen Kosel, Andrey Chuvilin, Paolo Vavassori

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

7 Scopus citations

Abstract

We explore electrodeposited ordered arrays of Fe, Ni and Co nanorods embedded in anodic alumina membranes as a source of intense magnetic stray field gradients localized at the nanoscale. We perform a multiscale characterization of the stray fields using a combination of experimental methods (Magneto-optical Kerr effect, Virtual Bright Field Differential Phase Contrast Imaging) and micromagnetic simulations, and establish a clear correlation between the stray fields and the magnetic configurations of the nanorods. For uniformly magnetized Fe and Ni wires the field gradients vary following saturation magnetization of corresponding metal and the diameter of the wires. In the case of Co nanorods, very localized (~10 nm) and intense (> 1T) stray field sources are associated with the cores of magnetic vortexes. Confinement of that strong field at extremely small dimensions leads to exceptionally high field gradients up to 108 T/m. These results demonstrate a clear path to design and fine-tune nanoscale magnetic stray field ordered patterns with a broad applicability in key nanotechnologies, such as nanomedicine, nanobiology, nanoplasmonics and sensors.

Original language	English (US)
Pages (from-to)	4678-4685
Number of pages	8
Journal	ACS Applied Materials & Interfaces
Volume	11
Issue number	4
DOIs	https://doi.org/10.1021/acsami.8b19873
State	Published - Jan 4 2019

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: P.V., A.Ch., and M.P. acknowledge support from the Spanish Ministry of Economy, Industry and Competitiveness under the Maria de Maeztu Units of Excellence Programme - MDM-2016-0618, the Project FIS2015-64519-R, and (M.P.) the grant BES-2013-063690. J.L gratefully acknowledges postdoctoral research fellowships by the Fonds Wetenschappelijk Onderzoek (FWO-Vlaanderen) and the Ghent University Special Research Fund (BOF). We gratefully acknowledge the support of NVIDIA Corporation with the donation of the GPU’s used for this research. Y.P.I. acknowledge support from the grant 3.7383.2017/8.9 of Ministry of Education and Science of Russian Federation.

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https://repository.kaust.edu.sa/bitstream/10754/630778/1/acsami.8b19873.pdf

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@article{719498221a8840db90cf77adab369d2e,

title = "Design of intense nanoscale stray fields and gradients at magnetic nanorod interfaces",

abstract = "We explore electrodeposited ordered arrays of Fe, Ni and Co nanorods embedded in anodic alumina membranes as a source of intense magnetic stray field gradients localized at the nanoscale. We perform a multiscale characterization of the stray fields using a combination of experimental methods (Magneto-optical Kerr effect, Virtual Bright Field Differential Phase Contrast Imaging) and micromagnetic simulations, and establish a clear correlation between the stray fields and the magnetic configurations of the nanorods. For uniformly magnetized Fe and Ni wires the field gradients vary following saturation magnetization of corresponding metal and the diameter of the wires. In the case of Co nanorods, very localized (~10 nm) and intense (> 1T) stray field sources are associated with the cores of magnetic vortexes. Confinement of that strong field at extremely small dimensions leads to exceptionally high field gradients up to 108 T/m. These results demonstrate a clear path to design and fine-tune nanoscale magnetic stray field ordered patterns with a broad applicability in key nanotechnologies, such as nanomedicine, nanobiology, nanoplasmonics and sensors.",

author = "Ivanov, {Yurii P.} and Jonathan Leliaert and Adrian Crespo and Matteo Pancaldi and Christopher Tollan and J{\"u}rgen Kosel and Andrey Chuvilin and Paolo Vavassori",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: P.V., A.Ch., and M.P. acknowledge support from the Spanish Ministry of Economy, Industry and Competitiveness under the Maria de Maeztu Units of Excellence Programme - MDM-2016-0618, the Project FIS2015-64519-R, and (M.P.) the grant BES-2013-063690. J.L gratefully acknowledges postdoctoral research fellowships by the Fonds Wetenschappelijk Onderzoek (FWO-Vlaanderen) and the Ghent University Special Research Fund (BOF). We gratefully acknowledge the support of NVIDIA Corporation with the donation of the GPU{\textquoteright}s used for this research. Y.P.I. acknowledge support from the grant 3.7383.2017/8.9 of Ministry of Education and Science of Russian Federation.",

year = "2019",

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doi = "10.1021/acsami.8b19873",

language = "English (US)",

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T1 - Design of intense nanoscale stray fields and gradients at magnetic nanorod interfaces

AU - Ivanov, Yurii P.

AU - Leliaert, Jonathan

AU - Crespo, Adrian

AU - Pancaldi, Matteo

AU - Tollan, Christopher

AU - Kosel, Jürgen

AU - Chuvilin, Andrey

AU - Vavassori, Paolo

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: P.V., A.Ch., and M.P. acknowledge support from the Spanish Ministry of Economy, Industry and Competitiveness under the Maria de Maeztu Units of Excellence Programme - MDM-2016-0618, the Project FIS2015-64519-R, and (M.P.) the grant BES-2013-063690. J.L gratefully acknowledges postdoctoral research fellowships by the Fonds Wetenschappelijk Onderzoek (FWO-Vlaanderen) and the Ghent University Special Research Fund (BOF). We gratefully acknowledge the support of NVIDIA Corporation with the donation of the GPU’s used for this research. Y.P.I. acknowledge support from the grant 3.7383.2017/8.9 of Ministry of Education and Science of Russian Federation.

PY - 2019/1/4

Y1 - 2019/1/4

N2 - We explore electrodeposited ordered arrays of Fe, Ni and Co nanorods embedded in anodic alumina membranes as a source of intense magnetic stray field gradients localized at the nanoscale. We perform a multiscale characterization of the stray fields using a combination of experimental methods (Magneto-optical Kerr effect, Virtual Bright Field Differential Phase Contrast Imaging) and micromagnetic simulations, and establish a clear correlation between the stray fields and the magnetic configurations of the nanorods. For uniformly magnetized Fe and Ni wires the field gradients vary following saturation magnetization of corresponding metal and the diameter of the wires. In the case of Co nanorods, very localized (~10 nm) and intense (> 1T) stray field sources are associated with the cores of magnetic vortexes. Confinement of that strong field at extremely small dimensions leads to exceptionally high field gradients up to 108 T/m. These results demonstrate a clear path to design and fine-tune nanoscale magnetic stray field ordered patterns with a broad applicability in key nanotechnologies, such as nanomedicine, nanobiology, nanoplasmonics and sensors.

AB - We explore electrodeposited ordered arrays of Fe, Ni and Co nanorods embedded in anodic alumina membranes as a source of intense magnetic stray field gradients localized at the nanoscale. We perform a multiscale characterization of the stray fields using a combination of experimental methods (Magneto-optical Kerr effect, Virtual Bright Field Differential Phase Contrast Imaging) and micromagnetic simulations, and establish a clear correlation between the stray fields and the magnetic configurations of the nanorods. For uniformly magnetized Fe and Ni wires the field gradients vary following saturation magnetization of corresponding metal and the diameter of the wires. In the case of Co nanorods, very localized (~10 nm) and intense (> 1T) stray field sources are associated with the cores of magnetic vortexes. Confinement of that strong field at extremely small dimensions leads to exceptionally high field gradients up to 108 T/m. These results demonstrate a clear path to design and fine-tune nanoscale magnetic stray field ordered patterns with a broad applicability in key nanotechnologies, such as nanomedicine, nanobiology, nanoplasmonics and sensors.

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U2 - 10.1021/acsami.8b19873

DO - 10.1021/acsami.8b19873

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SN - 1944-8244

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SP - 4678

EP - 4685

JO - ACS Applied Materials & Interfaces

JF - ACS Applied Materials & Interfaces

IS - 4

ER -

Design of intense nanoscale stray fields and gradients at magnetic nanorod interfaces

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