Nuclear Magnetic Susceptibility of SolidHe3Cooled by Compression from the Liquid Phase

Abstract
Using the cooling power of the adiabatic solidification of He3, we have reached temperatures near 2 mK and have measured the temperature dependence of the susceptibility of solid He3 down to 6 mK. The magnetic ordering is antiferromagnetic, with a Weiss θ=3.0±0.3 mK corresponding to a Néel temperature of 2.1 mK for bcc He3 at 34 atm.