Analysing magnetism using scanning SQUID microscopy

Scanning superconducting quantum interference device microscopy (SSM) is a scanning probe technique that images local magnetic flux, which allows for mapping of magnetic fields with high field and spatial accuracy. Many studies involving SSM have been published in the last few decades, using SSM to...

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Main Authors: Reith, P., Wang, Renshaw Xiao, Hilgenkamp, H.
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2018
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Online Access:https://hdl.handle.net/10356/102616
http://hdl.handle.net/10220/47265
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1026162023-02-28T19:23:09Z Analysing magnetism using scanning SQUID microscopy Reith, P. Wang, Renshaw Xiao Hilgenkamp, H. School of Electrical and Electronic Engineering School of Physical and Mathematical Sciences Condensed Matter Properties Microscopy DRNTU::Science::Physics Scanning superconducting quantum interference device microscopy (SSM) is a scanning probe technique that images local magnetic flux, which allows for mapping of magnetic fields with high field and spatial accuracy. Many studies involving SSM have been published in the last few decades, using SSM to make qualitative statements about magnetism. However, quantitative analysis using SSM has received less attention. In this work, we discuss several aspects of interpreting SSM images and methods to improve quantitative analysis. First, we analyse the spatial resolution and how it depends on several factors. Second, we discuss the analysis of SSM scans and the information obtained from the SSM data. Using simulations, we show how signals evolve as a function of changing scan height, SQUID loop size, magnetization strength, and orientation. We also investigated 2-dimensional autocorrelation analysis to extract information about the size, shape, and symmetry of magnetic features. Finally, we provide an outlook on possible future applications and improvements. MOE (Min. of Education, S’pore) Published version 2018-12-28T02:15:58Z 2019-12-06T20:57:38Z 2018-12-28T02:15:58Z 2019-12-06T20:57:38Z 2017 Journal Article Reith, P., Wang, R. X., & Hilgenkamp, H. (2017). Analysing magnetism using scanning SQUID microscopy. Review of Scientific Instruments, 88(12), 123706-. doi:10.1063/1.5001390 0034-6748 https://hdl.handle.net/10356/102616 http://hdl.handle.net/10220/47265 10.1063/1.5001390 en Review of Scientific Instruments © 2017 American Institute of Physics. This paper was published in Review of Scientific Instruments and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. The published version is available at: [http://dx.doi.org/10.1063/1.5001390]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 10 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Condensed Matter Properties
Microscopy
DRNTU::Science::Physics
spellingShingle Condensed Matter Properties
Microscopy
DRNTU::Science::Physics
Reith, P.
Wang, Renshaw Xiao
Hilgenkamp, H.
Analysing magnetism using scanning SQUID microscopy
description Scanning superconducting quantum interference device microscopy (SSM) is a scanning probe technique that images local magnetic flux, which allows for mapping of magnetic fields with high field and spatial accuracy. Many studies involving SSM have been published in the last few decades, using SSM to make qualitative statements about magnetism. However, quantitative analysis using SSM has received less attention. In this work, we discuss several aspects of interpreting SSM images and methods to improve quantitative analysis. First, we analyse the spatial resolution and how it depends on several factors. Second, we discuss the analysis of SSM scans and the information obtained from the SSM data. Using simulations, we show how signals evolve as a function of changing scan height, SQUID loop size, magnetization strength, and orientation. We also investigated 2-dimensional autocorrelation analysis to extract information about the size, shape, and symmetry of magnetic features. Finally, we provide an outlook on possible future applications and improvements.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Reith, P.
Wang, Renshaw Xiao
Hilgenkamp, H.
format Article
author Reith, P.
Wang, Renshaw Xiao
Hilgenkamp, H.
author_sort Reith, P.
title Analysing magnetism using scanning SQUID microscopy
title_short Analysing magnetism using scanning SQUID microscopy
title_full Analysing magnetism using scanning SQUID microscopy
title_fullStr Analysing magnetism using scanning SQUID microscopy
title_full_unstemmed Analysing magnetism using scanning SQUID microscopy
title_sort analysing magnetism using scanning squid microscopy
publishDate 2018
url https://hdl.handle.net/10356/102616
http://hdl.handle.net/10220/47265
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