Indication of Stochastic Photothermal Dynamics around a Topological Defect in a Chiral Magnet
Researchers used pump-probe Lorentz transmission electron microscopy to study a helical-to-paramagnetic phase transition in Co9Zn9Mn2 under femtosecond laser excitation. They found that magnetic order recovers directionally due to thermal diffusion, but around a magnetic edge dislocation, the recovery is delayed and exhibits transient blurring, suggesting stochastic dynamics involving multiple relaxation paths.