Measurement ofBversusHof Alumel from 25 to 180thinsp;deg;C

摘要

The relationship between the magnetic inductionBand the magnetic fieldHin Alumel was measured by the ring method for temperaturesTbetween 25 and 180thinsp;deg;C. These data were needed to correct for large temperature measurement errors that occurred when Chromelhyphen;vshyphen;Alumel thermocouples were used in a magnetic field. Through application of the Weiss equation, the saturation value of the intrinsic magnetic inductionBswas calculated as a function ofTfrom the experimentalBhyphen;vshyphen;Tdata. Weissrsquo;s method was used to determine the Curie temperature of Alumel,Tcquest;152thinsp;deg;C, from a plot ofB2sversusTnearTc. The experimental values ofBsversusTwere in good agreement with those obtained from the Brillouin function with quantum numberJ=1/2.