Application of magnetization measurements in iron to high temperature thermometry

Abstract
It is proposed to use iron whiskers as elements for magnetic thermometers. The sharpness and reproducibility of the large second harmonic response that occurs just as the centre of the whisker saturates depends upon temperature through Ms(T). As a thermometer the whisker has a built‐in fixed point which is reproducible to parts in 106. A one point calibration is needed to determined the demagnetizing factor. Suggestions are made for incorporating magnetic thermometers into thermocouples and resistance thermometers.