3D nano-bridge-based SQUID susceptometers for scanning magnetic imaging of quantum materials.

08:00 EDT 9th April 2019 | BioPortfolio

Summary of "3D nano-bridge-based SQUID susceptometers for scanning magnetic imaging of quantum materials."

We designed and fabricated a new type of superconducting quantum interference device (SQUID) susceptometers for magnetic imaging of quantum materials. The 2-junction SQUID sensors employ 3D Nb nano-bridges fabricated using electron beam lithography. The two counter-wound balanced pickup loops of the SQUID enable gradiometric measurement and they are surrounded by a one-turn field coil for susceptibility measurements. The smallest pickup loop of the SQUIDs were 1 μm in diameter and the flux noise was around 1 μΦ<sub>0</sub> /√Hz at 100 Hz. We demonstrate scanning magnetometry, susceptometry and current magnetometry on some test samples using these nano-SQUIDs.


Journal Details

This article was published in the following journal.

Name: Nanotechnology
ISSN: 1361-6528


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