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.


Published in:
New Journal of Physics, 18, 1, 013019
Year:
2016
Publisher:
Bristol, Institute of Physics (IoP) and Deutsche Physikalische Gesellschaft
ISSN:
1367-2630
Keywords:
Laboratories:




 Record created 2016-02-10, last modified 2018-03-17


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