Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Navau, Carles, Mach-Batlle, Rosa, Parra, Albert, Prat-Camps, Jordi, Laut, Sergi, Del-Valle, Nuria, Sanchez, Alvaro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2017
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
_version_ 1782515712318767104
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
work_keys_str_mv AT navaucarles enhancingthesensitivityofmagneticsensorsby3dmetamaterialshells
AT machbatllerosa enhancingthesensitivityofmagneticsensorsby3dmetamaterialshells
AT parraalbert enhancingthesensitivityofmagneticsensorsby3dmetamaterialshells
AT pratcampsjordi enhancingthesensitivityofmagneticsensorsby3dmetamaterialshells
AT lautsergi enhancingthesensitivityofmagneticsensorsby3dmetamaterialshells
AT delvallenuria enhancingthesensitivityofmagneticsensorsby3dmetamaterialshells
AT sanchezalvaro enhancingthesensitivityofmagneticsensorsby3dmetamaterialshells