Scanning SQUID microscopy in a cryogen-free dilution refrigerator
MetadataShow full item record
Altmetrics Handle Statistics
Altmetrics DOI Statistics
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 µm 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.
Low , D , Ferguson , G M , Jarjour , A , Schaefer , B T , Bachmann , M D , Moll , P J W & Nowack , K C 2021 , ' Scanning SQUID microscopy in a cryogen-free dilution refrigerator ' , Review of Scientific Instruments , vol. 92 , no. 8 , 083704 . https://doi.org/10.1063/5.0047652
Review of Scientific Instruments
Copyright © 2021 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license.