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Title: Analysing magnetism using scanning SQUID microscopy
Authors: Reith, P.
Wang, Renshaw Xiao
Hilgenkamp, H.
Keywords: Condensed Matter Properties
Issue Date: 2017
Source: 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
Series/Report no.: Review of Scientific Instruments
Abstract: 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.
ISSN: 0034-6748
DOI: 10.1063/1.5001390
Schools: School of Electrical and Electronic Engineering 
School of Physical and Mathematical Sciences 
Rights: © 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: []. 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.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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