# Inverse Faraday effect

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**The inverse Faraday effect** is the effect opposite to the Faraday effect. A static magnetization is induced by an external oscillating electrical field with the frequency , which can be achieved with a high intensity laser pulse for example. The induced magnetization is proportional to the vector product of and :

From this equation we see that the circularly polarized light with the frequency should induce a magnetization along the wave vector . Because is in the vector product, left- and right-handed polarization waves should induce magnetization of opposite signs.

The induced magnetization is comparable to the saturated magnetization of the media.

## References

- R. Hertel,
*Microscopic theory of the inverse Faraday effect*, http://arxiv.org/abs/cond-mat/0509060 (2005) - A. V. Kimel, A. Kirilyuk, P. A. Usachev, R. V. Pisarev, A. M. Balbashov and Th. Rasing,
*Ultrafast non-thermal control of magnetization by instantaneous photomagnetic pulses*, Nature 435, 655-657 (2005)