Effect of magnetic fields on spin fluctuations in metals: Electronic specific heat and electrical resistivity

Abstract

The spin-fluctuation contribution to the electronic specific-heat enhancement and to the resistivity is calculated in the presence of a magnetic field using the random-phase approximation. The result is a depression of these contributions in the presence of the field thus providing a test of the paramagnon theory. A comparison with experiments on U${\mathrm{Al}}_{2}$ is presented and a measurable effect of several percent is predicted in very high magnetic fields of the order of 100 kG.