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  Scanning SQUID microscopy in a cryogen-free dilution refrigerator

Low, D., Ferguson, G. M., Jarjour, A., Schaefer, B. T., Bachmann, M. D., Moll, P. J. W., et al. (2021). Scanning SQUID microscopy in a cryogen-free dilution refrigerator. Review of Scientific Instruments, 92(8): 083704, pp. 1-7. doi:10.1063/5.0047652.

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 Creators:
Low, D.1, Author
Ferguson, G. M.1, Author
Jarjour, Alexander1, Author
Schaefer, Brian T.1, Author
Bachmann, Maja D.2, Author           
Moll, Philip J. W.1, Author
Nowack, Katja C.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Microstructured Quantum Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_2466701              

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 Abstract: We report a scanning superconducting quantum interference device (SQUID) microscope in a cryogen-free dilution refrigerator with a base temperature at the sample stage of at least 30 mK. The microscope is rigidly mounted to the mixing chamber plate to optimize thermal anchoring of the sample. The microscope housing fits into the bore of a superconducting vector magnet, and our design accommodates a large number of wires connecting the sample and sensor. Through a combination of vibration isolation in the cryostat and a rigid microscope housing, we achieve relative vibrations between the SQUID and the sample that allow us to image with micrometer resolution over a 150 mu m range while the sample stage temperature remains at base temperature. To demonstrate the capabilities of our system, we show images acquired simultaneously of the static magnetic field, magnetic susceptibility, and magnetic fields produced by a current above a superconducting micrometer-scale device.

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Language(s): eng - English
 Dates: 2021-08-242021-08-24
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: ISI: 000687803700002
DOI: 10.1063/5.0047652
 Degree: -

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Title: Review of Scientific Instruments
  Abbreviation : Rev. Sci. Instrum.
Source Genre: Journal
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Publ. Info: Melville, NY : AIP Publishing
Pages: - Volume / Issue: 92 (8) Sequence Number: 083704 Start / End Page: 1 - 7 Identifier: ISSN: 0034-6748
CoNE: https://pure.mpg.de/cone/journals/resource/991042742033452