Heat current-driven topological spin texture transformations and helical q-vector switching

Fehmi Sami Yasin (), Jan Masell, Kosuke Karube, Daisuke Shindo, Yasujiro Taguchi, Yoshinori Tokura and Xiuzhen Yu ()
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Fehmi Sami Yasin: RIKEN Center for Emergent Matter Science (CEMS)
Jan Masell: RIKEN Center for Emergent Matter Science (CEMS)
Kosuke Karube: RIKEN Center for Emergent Matter Science (CEMS)
Daisuke Shindo: RIKEN Center for Emergent Matter Science (CEMS)
Yasujiro Taguchi: RIKEN Center for Emergent Matter Science (CEMS)
Yoshinori Tokura: RIKEN Center for Emergent Matter Science (CEMS)
Xiuzhen Yu: RIKEN Center for Emergent Matter Science (CEMS)

Nature Communications, 2023, vol. 14, issue 1, 1-8

Abstract: Abstract The use of magnetic states in memory devices has a history dating back decades, and the experimental discovery of magnetic skyrmions and subsequent demonstrations of their control via magnetic fields, heat, and electric/thermal currents have ushered in a new era for spintronics research and development. Recent studies have experimentally discovered the antiskyrmion, the skyrmion’s antiparticle, and while several host materials have been identified, control via thermal current remains elusive. In this work, we use thermal current to drive the transformation between skyrmions, antiskyrmions and non-topological bubbles, as well as the switching of helical states in the antiskyrmion-hosting ferromagnet (Fe0.63Ni0.3Pd0.07)3P at room temperature. We discover that a temperature gradient $${{{{{\boldsymbol{\nabla }}}}}}T$$ ∇ T drives a transformation from antiskyrmions to non-topological bubbles to skyrmions while under a magnetic field and observe the opposite, unidirectional transformation from skyrmions to antiskyrmions at zero-field, suggesting that the antiskyrmion, more so than the skyrmion, is robustly metastable at zero field.

Date: 2023
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DOI: 10.1038/s41467-023-42846-7

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