Specific heat due to amorphous surface layers in liquid and solid 3He

We have observed an excess specific heat for solid He-3 in silver sinter from melting pressure to 55 bar below a few tens of mK. The excess specific heat is nearly independent of temperature. Except for the solid near the melting pressure, the magnitude of the excess specific heat is almost constant throughout a wide pressure region. This fact is explained in terms of the presence of about two layers of amorphous surface solid He-3 on the heterogeneous silver-sinter substrate. (C) 2000 Elsevier Science B.V. All rights reserved.