Ultrafast Time-Resolved Faraday Rotation in EuO Thin Films

Abstract

We have investigated the ultrafast spin dynamics in EuO thin films by time-resolved Faraday rotation spectroscopy. The photoinduced magnetization is found to be increased in a transient manner, accompanied with subsequent demagnetization. The dynamical magnetization enhancement showed a maximum slightly below the Curie temperature with prolonged tails toward both lower and higher temperatures and dominates the demagnetization counterpart at 55 K. The magnetization enhancement component decays in ~1 ns. The realization of the transient collective ordering is attributable to the enhancement of the f-d exchange interaction.

8 pages, 4 figures, accepted for publication in Phys. Rev. Lett

References in corpus (2)

• Ultrafast Enhancement of Ferromagnetism via Photoexcited Holes in GaMnAs
• Soft x-ray magnetic circular dichroism study on Gd-doped EuO thin films

Cited by in corpus (11)

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• Tuning the Ultrafast Spin Dynamics in Carrier-Density-Controlled Ferromagnets
• Spin-dependent optical response of multiferroic EuO
• Femtosecond phononic coupling to both spins and charges in a room temperature antiferromagnetic semiconductor
• Ultrafast optical control of magnetization in EuO thin films
• Plasmon Enhanced Faraday Rotation in Thin Films
• Magnetic-field-induced crossover from the inverse Faraday effect to the optical orientation in EuTe
• Pulsed Laser Deposition of Rocksalt Magnetic Binary Oxides
• Manipulating femtosecond magnetism through pressure: First-principles calculations
• Growth of EuO single crystals at reduced temperatures
• Time dependent Faraday rotation