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Towards a table-top microscope for nanoscale magnetic imaging using picosecond thermal gradients

Research advancement in magnetoelectronics is challenged by the lack of a table-top magnetic measurement technique with the simultaneous temporal and spatial resolution necessary for characterizing magnetization dynamics in devices of interest, such as magnetic memory and spin torque oscillators. Al...

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Detalles Bibliográficos
Autores principales: Bartell, J. M., Ngai, D. H., Leng, Z., Fuchs, G. D.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Pub. Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4598727/
https://www.ncbi.nlm.nih.gov/pubmed/26419515
http://dx.doi.org/10.1038/ncomms9460
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author Bartell, J. M.
Ngai, D. H.
Leng, Z.
Fuchs, G. D.
author_facet Bartell, J. M.
Ngai, D. H.
Leng, Z.
Fuchs, G. D.
author_sort Bartell, J. M.
collection PubMed
description Research advancement in magnetoelectronics is challenged by the lack of a table-top magnetic measurement technique with the simultaneous temporal and spatial resolution necessary for characterizing magnetization dynamics in devices of interest, such as magnetic memory and spin torque oscillators. Although magneto-optical microscopy provides superb temporal resolution, its spatial resolution is fundamentally limited by optical diffraction. To address this challenge, we study heat rather than light as a vehicle to stroboscopically transduce a local magnetic moment into an electrical signal while retaining picosecond temporal resolution. Using this concept, we demonstrate spatiotemporal magnetic microscopy using the time-resolved anomalous Nernst effect (TRANE). Experimentally and with supporting numerical calculations, we find that TRANE microscopy has temporal resolution below 30 ps and spatial resolution determined by the area of thermal excitation. Based on these findings, we suggest a route to exceed the limits imposed by far-field optical diffraction.
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spelling pubmed-45987272015-10-21 Towards a table-top microscope for nanoscale magnetic imaging using picosecond thermal gradients Bartell, J. M. Ngai, D. H. Leng, Z. Fuchs, G. D. Nat Commun Article Research advancement in magnetoelectronics is challenged by the lack of a table-top magnetic measurement technique with the simultaneous temporal and spatial resolution necessary for characterizing magnetization dynamics in devices of interest, such as magnetic memory and spin torque oscillators. Although magneto-optical microscopy provides superb temporal resolution, its spatial resolution is fundamentally limited by optical diffraction. To address this challenge, we study heat rather than light as a vehicle to stroboscopically transduce a local magnetic moment into an electrical signal while retaining picosecond temporal resolution. Using this concept, we demonstrate spatiotemporal magnetic microscopy using the time-resolved anomalous Nernst effect (TRANE). Experimentally and with supporting numerical calculations, we find that TRANE microscopy has temporal resolution below 30 ps and spatial resolution determined by the area of thermal excitation. Based on these findings, we suggest a route to exceed the limits imposed by far-field optical diffraction. Nature Pub. Group 2015-09-30 /pmc/articles/PMC4598727/ /pubmed/26419515 http://dx.doi.org/10.1038/ncomms9460 Text en Copyright © 2015, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. 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
Bartell, J. M.
Ngai, D. H.
Leng, Z.
Fuchs, G. D.
Towards a table-top microscope for nanoscale magnetic imaging using picosecond thermal gradients
title Towards a table-top microscope for nanoscale magnetic imaging using picosecond thermal gradients
title_full Towards a table-top microscope for nanoscale magnetic imaging using picosecond thermal gradients
title_fullStr Towards a table-top microscope for nanoscale magnetic imaging using picosecond thermal gradients
title_full_unstemmed Towards a table-top microscope for nanoscale magnetic imaging using picosecond thermal gradients
title_short Towards a table-top microscope for nanoscale magnetic imaging using picosecond thermal gradients
title_sort towards a table-top microscope for nanoscale magnetic imaging using picosecond thermal gradients
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4598727/
https://www.ncbi.nlm.nih.gov/pubmed/26419515
http://dx.doi.org/10.1038/ncomms9460
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