An in-line four-point resistivity measurement was carried out with a Quantum Design Physical Property Measurement System (PPMS). A single crystal (about 2 × 2 × 0.1 mm) was chosen and the contacts were made using gold wires and silver epoxy, on the flat plane of the crystal. The crystal was approximately 2 mm wide and 0.1 mm thick, with two inner voltage leads having a distance of about 0.5 mm.