The phenomenon causing the values of the magnetic flux density to lag behind the
values of the magnetizing force so that the increasing and decreasing fields differ
In regard to YIG-Tuned Oscillators, a magnetic lag effect of the magnetic
components of a YIG device that occurs when the tuning coil current is changed.
Hysteresis is measured in terms of the maximum resulting frequency difference at
a particular magnet current when the device is tuned from high to low frequency
and then from low to high frequency through the device operating frequency