The work was aimed at assessing relatioships betwwen composition and performanceThe temperature dependence of resistance in RuO2-based TFRs was studied in the range 1.2 K to 300 K. The resistance fits the exponential relationship R=R0exp(T/T0)x with x=1/4 at higher temperatures with a transition to the x=1/2 regime on the same sample at lower temperatures (<20 K). The transition temperature Tc between these regimeshas a well defined dependence on the sample resitance Rs. Both the R0 ant T0 values scale down as the RuO2 fraction and show similar dependences on the Mn content. The magnetoresistve responses were measured in same temperature range in magnetic field H uo to 20 Tesla. The measured relative change of resistance never exceedes 0.02 up to 8 Tesla. In summary the developed resistors exhibit superior performances in comparison with the prently used thermometers. In addition they they show predictable properties at changing temperature and magnetic field strength, making easier their calibration.
Thick film resistors as cryogenic thermometers / Affronte, Marco; M., Campani; Morten, Bruno; S., Piccinini; M., Prudenziati; M., Tamborin; O., Laborde. - STAMPA. - (1997), pp. 297-301. (Intervento presentato al convegno 2nd italian conference on sensors and microsystems tenutosi a Rome nel 3-5 february 1997).
Thick film resistors as cryogenic thermometers
AFFRONTE, Marco;MORTEN, Bruno;
1997
Abstract
The work was aimed at assessing relatioships betwwen composition and performanceThe temperature dependence of resistance in RuO2-based TFRs was studied in the range 1.2 K to 300 K. The resistance fits the exponential relationship R=R0exp(T/T0)x with x=1/4 at higher temperatures with a transition to the x=1/2 regime on the same sample at lower temperatures (<20 K). The transition temperature Tc between these regimeshas a well defined dependence on the sample resitance Rs. Both the R0 ant T0 values scale down as the RuO2 fraction and show similar dependences on the Mn content. The magnetoresistve responses were measured in same temperature range in magnetic field H uo to 20 Tesla. The measured relative change of resistance never exceedes 0.02 up to 8 Tesla. In summary the developed resistors exhibit superior performances in comparison with the prently used thermometers. In addition they they show predictable properties at changing temperature and magnetic field strength, making easier their calibration.
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