Abstract
It has been known since systematic study by Berman et al that dilute alloy of Au containing small amount of Fe is an excellent material for low-temperature thermocouples, but so far there was no Au(Fe) wires made in Japan commercially. Recently Osaka Oxygen Ind. Ltd. has developed Au+0.07at%Fe wires. This paper describes the tested results on Au(Fe)-Chromel and Au(Fe)-Cu thermocouples from room temperature down to 1.5K. Temperature variation of thermoelectric power and sensitivity, influence of magnetic field on the thermoelectric power, reproducibility and difference among thermoelectric powers of several specimens are examined. And also temperature variation of electrical resistivity of an Au(Fe) wire is determined to calculate its thermal conductivity.
