MAGNETOSTRICTION

Joule Magnetostriction — Shape Change in Magnetic Fields
Field Strength (kA/m) 0 kA/m
Material
AC Drive Off
0.00Strain (ppm)
0.00Elongation (μm)
0%Domain Alignment
Magnetostriction (Joule 1842): ferromagnetic materials change dimensions when magnetized. Magnetic domains align with an applied field, rotating crystalline axes and causing macroscopic strain. Terfenol-D achieves ~1500 ppm — used in sonar transducers, precision actuators, and energy harvesting.