Preparation and physical properties of Mg$_{x}$FeTe with tetragonal phase

Unlike Fe$_{1.01}$Se, which has a superconducting T$_{c}$ near 8 K, Fe$_{1+x}$Te shows no superconductivity though it forms the same tetragonal structure with 0.06 \textless $x$ \textless 0.17. The excess Fe (2) in Fe$_{1+x}$Te not only stabilizes the PbO-type crystal structure with space group P4/nmm but also is strongly magnetic as an electron donor. According to the spin fluctuation driven scenario of superconductivity the results indicate that FeTe with doping is a likely higher-temperature superconductor. In order to reduce the magnetic strength and keep the same tetragonal structure in Fe$_{1+x}$Te, in this work, we have prepared single phase samples Mg$_{x}$FeTe with $x$ around 0.1. Magnetic and electrical properties, the magnesium positions in the crystal structure as well as the possibility of high-T$_{c}$ superconductivity in the Mg$_{x}$FeTe system investigated will be discussed.