Abstract
We have performed a new method of production of enhanced liquid 3He nuclear magnetization at temperatures smaller than the Fermi temperature. The liquid is confined by microspheres (ϕ = 2000 Å) of a fluorocarbon polymer which contains nuclear 19F spins and paramagnetic electronic impurities.
The magnetization of the 19F spins is enhanced by Dynamic Nuclear Polarization. At the surface of the substrate, a magnetic interaction between the two spin species (19F and 3He) transmits the polarization of the surface 3He atoms which are absorbed in a solid-like layer. Since the magnetization exchange between the two 3He phases (Solid and Liquid) is much faster than all the relaxation processes, the enhancement is transmitted to the liquid 3He.
We have produced steady-state liquid 3He with positive and negative polarization enhancements, and obtain magnetization larger than the T = 0 equilibrium value.
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