What is Magnetostriction?

What is Magnetostriction?

Magnetostriction Defined

Magnetostriction is the property of certain magnetic materials to change their shape or dimensions in response to an external magnetic field.

Discovery and Research

The phenomenon was first noted by James Joule in 1842, establishing a foundational understanding of how magnetic fields affect materials.

Key Influencing Factors

• The magnitude and direction of the applied magnetic field

• The saturation magnetizationof the material

• The magnetic anisotropy of the material

• The magnetoelastic coupling of the material

• The temperature and stress state of the material

Applications

Magnetostriction is crucial in developing efficient actuators, sensors, and other devices that convert electromagnetic energy into mechanical energy.

Magnetostriction Effects

• Villari Effect

• Matteucci Effect

• Wiedemann Effect

Measurement Techniques

The magnetostriction coefficient, a key parameter, is measured using advanced techniques to ensure precise engineering of magnetostrictive materials.