It is characterized by a linear coupling between the system's magnetic polarization and mechanical strain.
Piezomagnetism differs from the related property of magnetostriction; if an applied magnetic field is reversed in direction, the strain produced changes signs.
Additionally, a non-zero piezomagnetic moment can be produced by mechanical strain alone, at zero fields, which is not true of magnetostriction.
[3] The first experimental observation of piezomagnetism was made in 1960, in the fluorides of cobalt and manganese.
[4] The strongest piezomagnet known is uranium dioxide, with magnetoelastic memory switching at magnetic fields near 180,000 Oe at temperatures below 30 kelvins.