Tracking the ultrafast motion of an antiferromagnetic order parameter
arXiv:1903.08604 · doi:10.1038/s41467-019-11961-9
Abstract
The unique functionalities of antiferromagnets offer promising routes to advance information technology. Their compensated magnetic order leads to spin resonances in the THz-regime, which suggest the possibility to coherently control antiferromagnetic (AFM) devices orders of magnitude faster than traditional electronics. However, the required time resolution, complex sublattice interations and the relative inaccessibility of the AFM order parameter pose serious challenges to studying AFM spin dynamics. Here, we reveal the temporal evolution of an AFM order parameter directly in the time domain. We modulate the AFM order in hexagonal YMnO by coherent magnon excitation and track the ensuing motion of the AFM order parameter using time-resolved optical second-harmonic generation (SHG). The dynamic symmetry reduction by the moving order parameter allows us to separate electron dynamics from spin dynamics. As transient symmetry reductions are common to coherent excitations, we have a general tool for tracking the ultrafast motion of an AFM order parameter.
arXiv comment5 pages, 4 figures
References in corpus (15)
- Antiferromagnetic spintronics
- Electrical switching of an antiferromagnet
- Antiferromagnetic opto-spintronics: Part of a collection of reviews on antiferromagnetic spintronics
- Ultrafast reversal of the ferroelectric polarization
- Spin Oscillations in Antiferromagnetic NiO Triggered by Circularly Polarized Light
- Inverse magneto-refraction as a mechanism for laser modification of spin-spin exchange parameters and subsequent terahertz emission from iron oxides
- Optical determination of the Neel vector in a CuMnAs thin-film antiferromagnet
- Ultrafast optical excitation of coherent magnons in antiferromagnetic NiO
- Tuning the Ultrafast Spin Dynamics in Carrier-Density-Controlled Ferromagnets
- Direct measurement of the three dimensional magnetization vector trajectory in GaMnAs by a magneto-optical pump-and-probe method
- A Generalized Ginzburg-Landau Approach to Second Harmonic Generation
- Lattice and spin excitations in multiferroic h-YMnO3
- Resonant optical control of the structural distortions that drive ultrafast demagnetization in CrO
- Coherent Acoustic Perturbation of Second-Harmonic-Generation in NiO
- Photo-creating supercooled spiral-spin states in a multiferroic manganite
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