AC Electrical Conductivity in High B/T

Measurements of the electrical conductivity of materials such as 2D electron systems are carried out using low frequency A.C. measurements using 4 or 6 wire measurements and high sensitivity lock-in amplifiers.

The key low temperature instrumentation includes a device that can rotate the samples about a horizontal axis at low temperatures using a bellows activated by liquid 4He as shown below.

Compatible Magnets

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Last modified on 14 September 2014