Synthesis and Physical Properties of Double Perovskite Pb$_{2}$FeReO$_{6}$

A double perovskite Pb$_{2}$FeReO$_{6}$, in which Fe and Re are ordered in a rock-salt type configuration, was prepared at a high pressure (6GPa) and high temperature (1000 $^{\circ}$C) condition. The crystal structure determined by the synchrotron X-ray powder diffraction was centrosymmetric with a space group $I$4/$m$ despite the presence of Pb$^{2+}$ ion at the $A$ -site. The lattice parameters are $a$ = 5.6159(1) \AA and $c$ = 7.9455(3) \AA. No structural transition to a lower symmetry was observed down to 23 K. The resistivity showed semiconducting behavior. This compound exhibited a ferrimagnetic transition at 420 K with saturation magnetizations depending on the degree of Fe$^{3+}$/Re$^{5+}$ ordering controlled by the cooling rate after the heat treatment.