High-current superconductor transport critical-current measurement option for the Quantum Design Physical Property Measurement System

We report on the design and operation of a transport critical-current measurement option for superconductors based on the widely used Physical Property Measurement System from Quantum Design. The system is capable of supplying transport currents up to 30 A while maintaining a sample temperature of 2.0 +/- 0.1 K, and currents up to 200 A at higher sample temperatures.