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Enhancing the sensitivity of magnetic sensors by 3D metamaterial shells
Magnetic sensors are key elements in our interconnected smart society. Their sensitivity becomes essential for many applications in fields such as biomedicine, computer memories, geophysics, or space exploration. Here we present a universal way of increasing the sensitivity of magnetic sensors by su...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5355979/ https://www.ncbi.nlm.nih.gov/pubmed/28303951 http://dx.doi.org/10.1038/srep44762 |
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author | Navau, Carles Mach-Batlle, Rosa Parra, Albert Prat-Camps, Jordi Laut, Sergi Del-Valle, Nuria Sanchez, Alvaro |
author_facet | Navau, Carles Mach-Batlle, Rosa Parra, Albert Prat-Camps, Jordi Laut, Sergi Del-Valle, Nuria Sanchez, Alvaro |
author_sort | Navau, Carles |
collection | PubMed |
description | Magnetic sensors are key elements in our interconnected smart society. Their sensitivity becomes essential for many applications in fields such as biomedicine, computer memories, geophysics, or space exploration. Here we present a universal way of increasing the sensitivity of magnetic sensors by surrounding them with a spherical metamaterial shell with specially designed anisotropic magnetic properties. We analytically demonstrate that the magnetic field in the sensing area is enhanced by our metamaterial shell by a known factor that depends on the shell radii ratio. When the applied field is non-uniform, as for dipolar magnetic field sources, field gradient is increased as well. A proof-of-concept experimental realization confirms the theoretical predictions. The metamaterial shell is also shown to concentrate time-dependent magnetic fields upto frequencies of 100 kHz. |
format | Online Article Text |
id | pubmed-5355979 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-53559792017-03-22 Enhancing the sensitivity of magnetic sensors by 3D metamaterial shells Navau, Carles Mach-Batlle, Rosa Parra, Albert Prat-Camps, Jordi Laut, Sergi Del-Valle, Nuria Sanchez, Alvaro Sci Rep Article Magnetic sensors are key elements in our interconnected smart society. Their sensitivity becomes essential for many applications in fields such as biomedicine, computer memories, geophysics, or space exploration. Here we present a universal way of increasing the sensitivity of magnetic sensors by surrounding them with a spherical metamaterial shell with specially designed anisotropic magnetic properties. We analytically demonstrate that the magnetic field in the sensing area is enhanced by our metamaterial shell by a known factor that depends on the shell radii ratio. When the applied field is non-uniform, as for dipolar magnetic field sources, field gradient is increased as well. A proof-of-concept experimental realization confirms the theoretical predictions. The metamaterial shell is also shown to concentrate time-dependent magnetic fields upto frequencies of 100 kHz. Nature Publishing Group 2017-03-17 /pmc/articles/PMC5355979/ /pubmed/28303951 http://dx.doi.org/10.1038/srep44762 Text en Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Navau, Carles Mach-Batlle, Rosa Parra, Albert Prat-Camps, Jordi Laut, Sergi Del-Valle, Nuria Sanchez, Alvaro Enhancing the sensitivity of magnetic sensors by 3D metamaterial shells |
title | Enhancing the sensitivity of magnetic sensors by 3D metamaterial shells |
title_full | Enhancing the sensitivity of magnetic sensors by 3D metamaterial shells |
title_fullStr | Enhancing the sensitivity of magnetic sensors by 3D metamaterial shells |
title_full_unstemmed | Enhancing the sensitivity of magnetic sensors by 3D metamaterial shells |
title_short | Enhancing the sensitivity of magnetic sensors by 3D metamaterial shells |
title_sort | enhancing the sensitivity of magnetic sensors by 3d metamaterial shells |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5355979/ https://www.ncbi.nlm.nih.gov/pubmed/28303951 http://dx.doi.org/10.1038/srep44762 |
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