Cryogenic Magnetic Shielding
Cryogenic magnetic shielding solutions for applications down to 4K, designed and manufactured with a specialist alloy with exceptional cryogenic permeability performance
There are many considerations to make when designing the perfect shield, one of which is the thermal environment in which the shield will be used. Some applications of magnetic shielding may take place at temperatures below −180 °C or −292.00 °F or 93.15 K. The magnetic permeability of a material has a temperature dependence, meaning that there is an optimal temperature range in which the permeability peaks.
The permeability of MuMetal® begins to drop below -40 °C, making this material unsuitable in low temperature applications. In these cases, we suggest an alternative cryogenic alloy to manufacture such shields, CRYOPHY®. CRYOPHY® is nickel-iron soft magnetic alloy (81% Ni, 5% Mo, and balance Fe) suitable for constructing magnetic shields for use at cryogenic temperatures, typically down to 4K.
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