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research article
Simultaneous electronic and the magnetic excitation of a ferromagnet by intense THz pulses
The speed of magnetization reversal is a key feature in magnetic data storage. Magnetic fields from intense THz pulses have been recently shown to induce small magnetization dynamics in a cobalt thin film on the sub-picosecond time scale. Here, we show that at higher field intensities, the THz electric field starts playing a role, strongly changing the dielectric properties of the cobalt thin film. Both the electronic and magnetic responses are found to occur simultaneously, with the electric field response persistent on a time scale orders of magnitude longer than the THz stimulus.
Type
research article
Web of Science ID
WOS:000372363800002
Authors
Publication date
2016
Published in
Volume
18
Issue
1
Article Number
013019
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
February 10, 2016
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