Spatiotemporal visualization of current-induced spin switching in the antiferromagnetic Weyl semimetal Mn₃Sn
A research team, led by Ryo Shimano of the University of Tokyo, has explored ultrafast spin dynamics in the antiferromagnetic Weyl semimetal Mn₃Sn, providing direct visualization of current-induced switching processes at the sub-nanosecond scale. Mn₃Sn is of particular interest for spintronic applications due to its non-collinear spin structure, which gives rise to distinct magnetic and electrical properties at room temperature.
Using spatiotemporally resolved magneto-optical Kerr effect imaging with electrical pulses as short as 140 picoseconds, the team captured the evolution of magnetic domains during switching in polycrystalline Mn₃Sn films. The measurements revealed two distinct regimes of magnetization reversal depending on the intensity and duration of the applied current pulse: a non-thermal process where switching occurs without disrupting the antiferromagnetic order, and a thermally assisted process involving transient heating beyond the magnetic ordering temperature.
Source: https://www.spintronics-info.com/spatiotemporal-visualization-current-induced-spin-switching-antiferromagnetic
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