On the anomalous CMN-He³ 3 thermal boundary resistance

It is proposed that the mechanism of the anomalously high thermal transfer rates observed between CAIN and liquid He³ is simply the electromagnetic dipole coupling between electrons and He³ nuclei. A crude theory based on this assumption explains the observed linear dependence of the Kapitza resistance R_K on T, the order of magnitude of the coefficient, and the absence to date of the effect in dilute He³-He⁴ solutions. We predict that (1)R_K(T) should go through a minimum at about 1 mdeg, (2)R_K should be decreased by applying a magnetic field, (3) a similar linear T dependence (though with much larger coefficient) should be seen in dilute solutions below 5 mdeg, and (4) a similar, though probably less striking effect, should be observed for ferromagnetic metals in contact with He 3 at sufficiently low temperatures.