The Villari effect or the magnetoelastic effect is the reverse of magnetostriction, which consists in changing the magnetization of a magnet under the action of mechanical deformations. Named after Italian physicist E. Villari, who discovered it in 1865. The table below shows the behavior of ferromagnets with different magnetostriction during their deformation.

Content

• 1Application
• 2SM. also
• 3Notes
• 4Links

Application

• The Villari effect can be used to conduct subtle physical experiments. In particular, one can find the dependence of the change in the temperature of a magnetic material on the saturation magnetostriction λs.

• Measurement of forces using magnetoelastic sensors (transducers) [1].

Compared with strain gauges, commonly used to measure forces, magnetoelastic sensors are characterized by increased reliability and output level, as well as using a simpler measuring circuit. They have found application in those areas of technology where there are increased requirements for reliability in connection with operation in harsh conditions, for example, in metallurgical production for weighing the charge before being loaded into a smelting furnace and on marine floating cranes as a load limiting system sensor.

see also

• Piezoelectric effect
• Electrostriction