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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...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Pub. Group
2015
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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. |
format | Online Article Text |
id | pubmed-4598727 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Nature Pub. Group |
record_format | MEDLINE/PubMed |
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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