Summary: AC Transport Option for
the PPMS
31 October, 2002
Outline
Basics of electrical transport
measurements
QD ACT Hardware
Performing ACT Measurements
Basic Troubleshooting
Electrical Resistance
Resistance: ratio of voltage across a sample
to the current through the sample
Ohm's law: R=V/I=constant
Constant is independent of V
Could depend on temperature
Samples which obey Ohm's law are called
resistors
I
v
Resistivity vs. Resistance