  The Stoner-Wohlfarth model provides an efficient analytical model to describe
the behavior of magnetic layers within xMR sensors. Combined with a proper
description of magneto-resistivity an efficient device model can be derived,
which is necessary for an optimal electric circuit design. Parameters of the
model are determined by global optimization of an application specific cost
function which contains measured resistances for different applied fields.
Several application cases are examined and used for validation of the device
model. Furthermore the applicability of the SW model is verified by comparison
with micromagnetic energy minimization results.
