Data on a Magnetic Shield Alloy at Low Magnetic Fields from 300 Kelvin to 1.91 Kelvin, and 0.08 Hz to 10kHz

We tested two samples of a commercial shielding alloy at 300, 77, 4 and 1.91 Kelvin, using field strengths of 4 and 50 gauss rms and frequencies from 0.08 Hz to 10 KHz. Both samples were effective shields, even at 1.91 Kelvin. One of the samples, which had received a special treatment, shielded even more effectively at 4 Kelvin than at 300 Kelvin, particularly at higher frequencies.