Hysteresis characteristics are typical of ferromagnetic materials. This means that the output parameter depends not only on its point of origin but also on the preceding output parameter. This is depicted in the form of a hysteresis curve or loop. With ferromagnetic materials, the magnetic flux in the material is indicated in accordance with the strength of the surrounding magnetic field. Here it becomes apparent that flux does not drop to 0 when the field disappears, but instead manifests pure residual magnetization (remanence). It also clearly manifests that a reversal of the magnetic field leads to the lower end of the hysteresis curve being tracked.