Antiferromagnetic order in Yb4Ru7As6 with the cubic U4Re7Si6-type structure

We investigated the electronic properties of Yb4Ru7As6 using single crystalline samples grown by the Bi-flux method. Yb4Ru7As6 crystallizes in the cubic U4Re7Si6-type structure. From the electrical resistivity, magnetic susceptibility, and specific heat measurements, we have found that Yb4Ru7As6 orders antiferromagnetically below the Néel temperature of 2.5 K with the moderately enhanced electronic specific heat coefficient of 120 mJ/(Yb-mol⋅K2). A rapid increment in magnetization of about 0.25 μB/Yb has been detected at low magnetic field below 4 K, implying a weak ferromagnetic component. •We succeeded in growing single crystals of a new Yb–Ru–As ternary compound, which is found to crystallize in the cubic U4Re7Si6 type structure.•We investigate the physical properties of Yb4Ru7As6.•This compound shows an antiferromagnetic transition at 2.5 K with the moderately enhanced electronic specific heat coefficient g of 120 mJ/(molYb K2).