Abstract
This paper reviews the properties of a range of Ge‐on‐GaAs film resistance thermometers that cover the temperature range 0.03 K to 500 K. A new dual element resistance thermometer is described, in which two temperature sensitive elements with overlapping thermometrical characteristics are combined to provide a thermometer with good sensitivity over the measurement range from 0.1 K to 400 K. A novel dual function sensor for concurrent measurements of temperature from 1.5 K to 400 K and magnetic field is also described. This consists of a Ge‐GaAs resistance thermometer and an InSb‐GaAs Hall‐effect magnetic field sensor combined in a single package.
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