
The ultrafast Barnett effect, where circularly polarized optical phonons induce spontaneous magnetization, can be used to reversibly switch the magnetic state of a nearby heterostructure.


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Ultrafast light-induced driving of phonons&nbsp;at resonance in a substrate facilitates the permanent reversal of the magnetic state of a material mounted on it.

Phononic switching of magnetization by the ultrafast Barnett effect - Nature

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Ultrafast Phononic Switching of Magnetization via the Barnett Effect
