Magnetic field dependence of the electronic specific heat of TiBe2: An estimate from magnetization data

Abstract

An estimate of the variation with magnetic field in the electronic specific heat of Ti${\mathrm{Be}}_2$ is given. From the thermodynamic relationship $\frac{\partial S}{\partial H}=\frac{\partial M}{\partial T}$ and from $M-\mathrm{v}\mathrm{s}-T$ data it follows that $\frac{C}{T}$ (at $T<\mathrm{}2\mathrm{}$ K) should remain constant within 0.2% for 0 ≤ $H$ ≤ 40 kOe. A further increase in $H$ up to 70 kOe should cause $\frac{C}{T}$ to drop by about 10%. This is in fair agreement with recent experimental results for $\frac{C}{T}\left(70\mathrm{} \mathrm{kOe}\right)-\frac{C}{T}\mathrm{}\left(0\right)\mathrm{}$. The origin of the drop in $\frac{C}{T}$ is still uncertain. Paramagnon theory gives no satisfactory fit of the high-field data.