Graphene Hall sensor enables commercial cryogenic applications
The GHS-C Graphene Hall sensor (GHS) provides the industry’s only viable approach to measuring magnetic field strengths of 7Tesla (T) and above, at temperature extremes below 3 Kelvin (K), says Paragraf.
The sensor enables commercial organisations to accurately measure high magnetic field strengths at cryogenic temperatures, increasing manufacturing throughput by quicker magnet mapping, replacing existing NMR probe mapping stages. It achieves this while dissipating virtually no heat.
The cryogenic sensor also allows measurements directly in cold bore, removing the need for room temperature inserts, giving quality data and time savings, confirms Paragraf.
The GHS-C is the only Hall sensor now in volume production that can offer this level of performance at temperatures below 3K. The underlying technology is capable of operating at temperatures even lower, with no loss of performance. To achieve this, Paragraf has harnessed the lack of any planar Hall effect in graphene.
The GHS-C uses graphene optimised and tuned for high field applications, including super-conduction, quantum computing, high energy physics, low temperature physics, fusion and space.
“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,” explains 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 GHS-C is supplied in the industry-standard LCC 20 package, making it a drop-in replacement for existing Hall sensors.
Paragraf develops and delivers commercial-quality graphene-based electronic devices using contamination-free technology that is both scalable and compatible with existing electronic device manufacturing production processes. Applications include the semiconductor, battery, green energy, and sensor markets.
