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Tytuł:
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Nanoscale Magnetization and Current Imaging Using Time-Resolved Scanning-Probe Magnetothermal Microscopy.
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Autorzy:
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Zhang C; School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States.
Bartell JM; School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States.
Karsch JC; School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States.
Gray I; School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States.
Fuchs GD; School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States.
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Źródło:
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Nano letters [Nano Lett] 2021 Jun 23; Vol. 21 (12), pp. 4966-4972. Date of Electronic Publication: 2021 Jun 08.
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Typ publikacji:
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Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.
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Język:
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English
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Imprint Name(s):
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Original Publication: Washington, DC : American Chemical Society, c2001-
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MeSH Terms:
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Microscopy, Scanning Probe*
Nanotechnology*
Microscopy, Atomic Force
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Grant Information:
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DMR-1719875 National Science Foundation; NNCI-2025233 National Science Foundation
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Contributed Indexing:
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Keywords: magnetic imaging; magnetothermal effects; near-field microscopy; scanning probe microscopy; spatiotemporal
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Entry Date(s):
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Date Created: 20210608 Date Completed: 20210701 Latest Revision: 20210701
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Update Code:
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20240104
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DOI:
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10.1021/acs.nanolett.1c00704
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PMID:
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34100623
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Magnetic microscopy that combines nanoscale spatial resolution with picosecond scale temporal resolution uniquely enables direct observation of the spatiotemporal magnetic phenomena that are relevant to future high-speed, high-density magnetic storage and logic technologies. Magnetic microscopes that combine these metrics has been limited to facility-level instruments. To address this gap in lab-accessible spatiotemporal imaging, we develop a time-resolved near-field magnetic microscope based on magnetothermal interactions. We demonstrate both magnetization and current density imaging modalities, each with spatial resolution that far surpasses the optical diffraction limit. In addition, we study the near-field and time-resolved characteristics of our signal and find that our instrument possesses a spatial resolution on the scale of 100 nm and a temporal resolution below 100 ps. Our results demonstrate an accessible and comparatively low-cost approach to nanoscale spatiotemporal magnetic microscopy in a table-top form to aid the science and technology of dynamic magnetic devices with complex spin textures.
