Specific Heats of some Paramagnetic Salts at Temperatures near 1 K.

Abstract

The magnetic specific heats of gadolinium sulphate and of several salts of the iron group of transition elements have been measured at temperatures near 1°K. by a method depending on paramagnetic relaxation. The results obtained are analysed into contributions due to magnetic dipole coupling and interaction of the magnetic ions with the electric field of the crystalline lattice. Cases in which these contributions are insufficient to account for the observed specific heats are discussed.