Magnetic Transport Properties in Pressure-Induced Superconductor EuFe$_{2}$As$_{2}$

A systematic pressure investigation of magnetoresistance and Hall effect has been performed on the antiferromagnetic compound EuFe$_{2}$As$_{2}$ which exhibits pressure-induced superconductivity ($T_{c}\sim $30 K and $P_{c}\sim $2.5 GPa). At ambient pressure, temperature dependence of Hall coefficient $R_{H}$ indicates that the dominant carrier below $T\sim $190 K ($T$: Structural and magnetic transition temperature) is electron-like. As pressure increases, both of the down-turn associated with $T$ and anomalous roll-over around 30 K in $R_{H}$ become less pronounced and shift to low temperature region. We will also refer to the temperature and field dependence of Hall angle \textit{$\theta $}$_{H}$ with applied pressures.