Simultaneous electronic and the magnetic excitation of a ferromagnet by intense THz pulses

Abstract

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 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

References in corpus (4)

• Sub-cycle control of terahertz high-harmonic generation by dynamical Bloch oscillations
• Toward a terahertz-driven electron gun
• Air nonlinear dynamics initiated by ultra-intense lambda-cubic THz pulses
• Temporal and Spectral Shaping of Broadband THz Pulses in a Photoexcited Semiconductor

Cited by in corpus (5)

• THz-driven ultrafast spin-lattice scattering in amorphous metallic ferromagnets
• Intense THz source based on BNA organic crystal pumped at Ti:Sapphire wavelength
• THz-driven demagnetization with Perpendicular Magnetic Anisotropy: Towards ultrafast ballistic switching
• Terahertz magnetic field enhancement in an asymmetric spiral metamaterial
• Polarization Effects of Electro-Optic Sampling and Over-Rotation for High Field THz Detection