The preparation and measurement of nickel spheres for use in the calibratio
n of magnetometers are described. The absolute value of the magnetic moment
of a set of these spheres near room temperature was measured using the Far
aday method. The variations of moment for temperatures near room temperatur
e and for applied fields between 0.3 and 5 T were also determined. [S0021-8
979(00)17408-0].