SECTION 5.3. EXPERIMENTAL DETERMINATION OF CRYSTAL-FIELD PARAMETERS 51
split and levels. In other words, from a comparison of the measured M(H)
curve with curves calculated by means of Eq. (3.1.4) for various values of one may
obtain an experimental value for the parameter Alternatively, one can keep H constant
and vary the temperature. Subsequently, one can compare measured M(T) or curves
with calculated curves (with again as adjustable parameter) and obtain in this way an