71003

Linear lossy ferromagnet

If we are prepared to consider smali signals, and the sinusoidal steady State, we canmodel

the behaviour of a materiał in which the magnetisation lags somewhat behind a sinusoidal

magnetic field excitation by the equations M = (x°

m- jx°°

m) H (5.15)

B = (p₀- jpoo) H (5.16)

The linear lossy ferromagnet model is tantamount to replacing the hysteresis curve of

Figurę 5.1 by an ellipse. Although the model does not exhibit the saturation phenomenon

shown in that figurę, at least the energy loss property of the hysteresis curve is retained