principle in magnetos striction

Magnetostriction generator is used to produce ultrasonic waves. It consist of a ferromagnetic rod and an electronic oscillator.when alternating current is produced by the electronic oscillator the rod experience a small change in length with the production of ultrasonic waves...

yes because it posses the properties of ferro magnetic materials

its due to intermolecular collision of magnetic domain .nd its also due to magnetostriction ..

An oscillator whose frequency is controlled by a magnetostrictive element.
Magnetostriction is a property of ferromagnetic materials that causes them to change their shape when subjected to a magnetic field. http://en.wikipedia.org/wiki/Magnetostriction ~MECHASUN~