We now examine the approach to target field and whether a "wait for stable field" command is required. Logging the field and field status as the magnet sweeps from +70 kOe to zero field (calibrated) shows the stable status is reached 1.5-2.3 s after reaching the target field but the field is consistently within ±0.5 Oe of the final value as it stabilises (Fig. and Fig. , Table ). We measured the magnetic moment of the sample continuously through the field change to experimentally interrogate when the zero field condition was reached by finding when d 3 M(t)/dt 3 = 0 (Fig. ). These data indicate zero field is achieved within ≈ 0.7 s of the log recording the target field. To capture a full decay in the target field, one must measure through the field change and use the first measured data point at the target field to define t = 0 and M 0 . Continuously measuring in VSM mode is the best method to achieve this as the delay is minimal: the first recorded datapoint is within 0.6 s of both the instrumental log reaching the target field and the third-derivative condition at all temperatures (< 1.3 s when data points missing around zero field, Fig. and). Including a "wait for stable field" command introduces an ∼ 8 s delay in acquiring the first point at the target field (VSM mode) and introduces artifacts in the first few points if autoranging is used (Table and Fig. ); DC scan measurements introduce longer delays (Table and Fig. ) which also depend on whether a measurement is in progress when reaching the target field.