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We report a detailed study of the electrical transport properties of singlecrystals of Pr$_4$Fe$_2$As$_2$Te$_{1-x}$O$_4$, a recently discovered iron-basedsuperconductor. Resistivity, Hall effect and magnetoresistance are measured ina broad temperature range revealing the role of electrons as dominant chargecarriers. The significant temperature dependence of the Hall coefficient andthe violation of Kohler's law indicate multiband effects in this compound. Theupper critical field and the magnetic anisotropy are investigated in fields upto 16 T, applied parallel and perpendicular to the crystallographic c-axis.Hydrostatic pressure up to 2 GPa linearly increases the critical temperatureand the resistivity residual ratio. A simple two-band model is used to describethe transport and magnetic properties of Pr$_4$Fe$_2$As$_2$Te$_{1-x}$O$_4$. Themodel can successfully explain the strongly temperature dependent negative Hallcoefficient and the high magnetic anisotropy assuming that the mobility ofelectrons is higher than that of holes.

Magnetotransport studies of Superconducting Pr$_4$Fe$_2$As$_2$Te$_{1-x}$O$_4$