AI Insight
Researchers demonstrated coherent control of magnetic order in the antiferromagnetic material FePS3 using terahertz light pulses. The terahertz radiation selectively excites specific lattice vibrations (phonons) that couple to the magnetic structure, enabling reversible switching between different metastable magnetic states at temperatures below the material's magnetic ordering temperature. This approach achieves ultrafast magnetic control on picosecond timescales without thermal heating, representing a non-thermal pathway to manipulate magnetic properties in layered antiferromagnets.
Why it matters
This work opens possibilities for ultrafast, energy-efficient magnetic memory and computing technologies that operate by directly controlling magnetic order with light rather than electric currents or magnetic fields. The phonon-mediated control mechanism could enable new classes of spintronic devices with switching speeds thousands of times faster than current technology.
Understand the Science
Source: Coherent terahertz control of metastable magnetization in FePS3