Villari effect

The inverse magnetostrictive effect (also known as magnetoelastic effect or Villari effect) is the name given to the change of the magnetic susceptibility of a material when subjected to a mechanical stress.

The magnetostriction ${\displaystyle \lambda }$ characterizes the shape change of a ferromagnetic material during magnetization, whereas the inverse magnetostrictive effect characterizes the change of sample magnetization ${\displaystyle M}$(for given magnetizing field strength ${\displaystyle H}$) when mechanical stresses ${\displaystyle \sigma }$ are applied to the sample.

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