The Rayleigh law describes the behavior of ferromagnetic materials at low fields.
is applied, domains parallel to the external field start to grow.
Lord Rayleigh investigated this first [1] and quantified the magnetization
The Rayleigh law was derived theoretically by Louis Néel.,[2][3] The same law describes polarization[4] and direct[5] and converse[6] piezoelectric response of some ferroelectric and ferroelectric-ferroelastic materials.
The common feature for ferromagnetic, ferroelectric and ferroelastic materials (i.e., ferroic materials) are domains whose boundaries (domain walls) can be moved by magnetic, electric or mechanical fields.