Analysis of the normal state magnetotransport in CeIrIn${}_5$

We present an analysis of the normal state magnetotransport in the heavy fermion superconductor CeIrIn${}_5$. The Hall effect and the transverse magnetoresistance in this material do not appear to be uniquely correlated, as inferred from the field dependence of the current ratio ($R_{\sigma} = \sigma_{xy} / \sigma_{xx}^2 H$). The Hall coefficient is seen to satisfy a scaling equation of the form $R_H=f[H\mathrm{/}(a+b{T}^c)]$. These results are compared to those observed earlier in CeCoIn${}_5$, and are discussed in terms of the contrasting phase diagram which the CeIrIn${}_5$ system exhibits in relation to its Co counterpart.