Graphene Hall sensor optimised for cryogenic applications

07-06-2021 | Paragraf | Test & Measurement

Paragraf has introduced the GHS-C Graphene Hall Sensor (GHS), offering the industry’s only viable approach to measuring magnetic field strengths of 7T and above at temperature extremes below 3K.

This Graphene-based Hall sensor is optimised to offer high field measurements while running at cryogenic temperatures. It accomplishes this while dissipating practically no heat. The cryogenic sensor also enables measurements directly in cold bore, eliminating the necessity for room temperature inserts, providing quality data and time savings.

The device is claimed to be the only Hall sensor in volume production that can provide this level of performance at temperatures below 3K. The underlying technology can operate at temperatures even lower, with no loss of performance. This is made feasible by the lack of any planar Hall effect in graphene, a unique feature that the company has harnessed.

"When looking for high sensitivity, one of the biggest challenges that researchers and engineers working at very low temperatures face is the instability caused by the heat dissipated by conventional sensors," commented Ellie Galanis, product owner at Paragraf. "This is particularly relevant when working in cryogenic applications, such as quantum computing. Our GHS-C dissipates nW of heat rather than mWs. This has a much smaller impact on the apparatus, allowing researchers to make accurate and repeatable measurements."

The device is provided in the industry-standard LCC 20 package, making it a drop-in replacement for existing Hall sensors.

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