Transient Exchange Interaction in a Helical Antiferromagnet

Abstract

We have performed time-resolved resonant x-ray scattering studies in the Lanthanide metal Dy to reveal the dynamic response of the helical order exchange coupling to injection of unpolarized spins. The observed spin dynamics are significantly slower than that exhibited by the ferromagnetic phase in Lanthanide metals and are strongly dependent on temperature and excitation fluence. This unique behavior results from transient changes in the shape of the conduction electron Fermi surface and subsequent scattering events that transfer the excitation to the core spin.

References in corpus (3)

• Super-Diffusive Spin-Transport as a Mechanism of Ultrafast Demagnetization
• Hot electron driven enhancement of spin-lattice coupling in 4f ferromagnets observed by femtosecond x-ray magnetic circular dichroism
• Domain walls in helical magnets

Cited by in corpus (3)

• Ultrafast and Energy-Efficient Quenching of Spin Order: Antiferromagnetism Beats Ferromagnetism
• Theory of magnetic ordering in the heavy rare earths: ab-initio electronic origin of pair- and four- spin interactions
• Ultrafast X-ray Diffraction Thermometry Measures the Influence of Spin Excitations on the Heat Transport through nanolayers