Community Research and Development Information Service - CORDIS


The four points method allows the measurement of the electrical properties of semiconductors and superconductors. The electrical resistivity can be obtained from such a measurement by analytical calculation only if the sample has the form of a parallelepiped or for a semi-infinite sample. The cylindrical form of the pellets has induced the use of a numerical method in order to calculate the resistivity value. A cryogenerator (GALILEO K1) has been adapted to receive cylindrical pellets in which the temperature measurements have been taken in three different positions with two silicon diodes and a Chromel-Gold thermocouple. A QBasic program has been written to command the IEEE-488 interfaced instruments of measurement, and to obtain in real time the plot of resistivity as a function of temperature.

Additional information

Authors: FEDUZI R, JRC Ispra (IT);LANZA F, JRC Ispra (IT);INZAGHI A, JRC Ispra (IT)
Bibliographic Reference: EUR 13689 EN (1991) 16 pp., MF, ECU 4, blow-up copy ECU 5
Availability: (2)
Record Number: 199111374 / Last updated on: 1994-12-02
Original language: en
Available languages: en