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<p>We demonstrate room-temperature nucleation and manipulation of topological spin textures in the van der Waals (vdW) ferromagnet Fe<sub>3</sub>GaTe<sub>2</sub> using laser-pulse excitation. Rapid laser-induced heating followed by cooling enables access to the skyrmion bubble state at low fields and drives reversible switching between this state and labyrinth domains. The switching requires a minimum of about 20 pulses, and further reduction of the pulse number is limited by sample degradation at higher fluence. The nucleation occurs at magnetic induction fields as low as 5 mT, which substantially lowers the field requirement compared to slow field-cooling approaches. Micromagnetic simulations attribute this switching to the thermal cycle induced by the laser. Our findings establish vdW ferromagnets as promising candidates for room-temperature, laser-controlled, non-volatile memory storage applications.</p>

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Laser-induced topological spin switching at room temperature in the van der Waals ferromagnet Fe3GaTe2

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月1日

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  • Charlie W. F. Freeman,
  • Woohyun Cho,
  • Paul S. Keatley,
  • PeiYu Cai,
  • Zekun Xue,
  • Chenghao Yang,
  • Harry Youel,
  • Elton J. G. Santos,
  • Robert J. Hicken,
  • Heejun Yang,
  • Hidekazu Kurebayashi,
  • Murat Cubukcu,
  • Maciej Dąbrowski

摘要

We demonstrate room-temperature nucleation and manipulation of topological spin textures in the van der Waals (vdW) ferromagnet Fe3GaTe2 using laser-pulse excitation. Rapid laser-induced heating followed by cooling enables access to the skyrmion bubble state at low fields and drives reversible switching between this state and labyrinth domains. The switching requires a minimum of about 20 pulses, and further reduction of the pulse number is limited by sample degradation at higher fluence. The nucleation occurs at magnetic induction fields as low as 5 mT, which substantially lowers the field requirement compared to slow field-cooling approaches. Micromagnetic simulations attribute this switching to the thermal cycle induced by the laser. Our findings establish vdW ferromagnets as promising candidates for room-temperature, laser-controlled, non-volatile memory storage applications.