Tuning the Ultrafast Spin Dynamics in Carrier-Density-Controlled Ferromagnets

Abstract

Ultrafast strengthening or quenching of the ferromagnetic order of semiconducting Eu1-xGdxO was achieved by resonant photoexcitation. The modification of the magnetic order is established within 3 ps as revealed by optical second harmonic generation. A theoretical analysis shows that the response is determined by the interplay of chemically and optically generated carriers in a nonequilibrium scenario beyond the three-temperature model. General criteria for the design of spintronics materials with tunable ultrafast spin dynamics are given.

7 pages, 4 figures

References in corpus (5)

• Ultrafast Enhancement of Ferromagnetism via Photoexcited Holes in GaMnAs
• Epitaxial and layer-by-layer growth of EuO thin films on yttria-stabilized cubic zirconia (001) using MBE distillation
• Simultaneous ferromagnetic metal-semiconductor transition in electron-doped EuO
• Ultrafast Time-Resolved Faraday Rotation in EuO Thin Films
• Giant third-order magneto-optical rotation in ferromagnetic EuO

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• Nonequilibrium magnons from hot electrons in antiferromagnetic systems
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• The magnetic exciton of EuS revealed by resonant inelastic x-ray scattering
• Theory of Curie temperature enhancement in electron-doped EuO
• Band Splitting and Long-lived Carrier Recombination in Ferromagnetic CrSiTe3 Nanosheets