four-point probe
  • A method of measuring sheet resistance, in which two pairs of precisely spaced probes contact the surface to be evaluated. One pair is utilized to pass a current through the specimen, while the other is used to measure the potential difference developed. The sheet resistance is then calculated from these current and potential difference values. Used, for instance, with semiconductor and superconductor materials. Its abbreviation is 4-point probe.
  • abbreviation 4-point probe

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