Uniaxial magnetocrystalline anisotropy in $\mathrm{C}\mathrm{a}\mathrm{R}\mathrm{u}{\mathrm{O}}_3$

$\mathrm{C}\mathrm{a}\mathrm{R}\mathrm{u}{\mathrm{O}}_3$ is a paramagnetic metal and since its low temperature resistivity is described by $\rho ={\rho }_0+A{T}^{\gamma }$ with $\gamma \sim 1.5$, it is also considered a non-Fermi liquid (NFL) metal. We have performed extensive magnetoresistance and Hall effect measurements of untwinned epitaxial films of $\mathrm{C}\mathrm{a}\mathrm{R}\mathrm{u}{\mathrm{O}}_3$. These measurements reveal that $\mathrm{C}\mathrm{a}\mathrm{R}\mathrm{u}{\mathrm{O}}_3$ exhibits uniaxial magnetocrystalline anisotropy. In addition, the low-temperature NFL behavior is most effectively suppressed when a magnetic field is applied along the easy axis, suggesting that critical spin fluctuations, possibly due to proximity of a quantum critical phase transition, are related to the NFL behavior.