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; Xiuzhen Yu

doi:10.1038/s41467-023-42846-7

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, Xiuzhen Yu

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

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 (Fe_0.63Ni_0.3Pd_0.07)₃P at room temperature. We discover that a temperature gradient ∇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.

Original language	English
Article number	7094
Journal	Nature Communications
Volume	14
Issue number	1
DOIs	https://doi.org/10.1038/s41467-023-42846-7
State	Published - Dec 2023
Externally published	Yes

Funding

We are very grateful to Tomoko Kikitsu (Materials Characterization Support Team in the RIKEN Center for Emergent Matter Science) for technical support on the TEM (JEM-2100F) and Naoto Nagaosa for helpful discussions. Y. Tokura acknowledges the support of Japan Science and Technology Agency (JST) CREST program (Grant Number JPMJCR1874). X.Y. acknowledges the support of Grants-In-Aid for Scientific Research (A) (Grant No. 19H00660) from JSPS and JST-CREST program (Grant No. JPMJCR20T1). J.M. was supported by the Alexander von Humboldt Foundation as a Feodor Lynen Return Fellow.

Funders	Funder number
Alexander von Humboldt-Stiftung
Japan Society for the Promotion of Science
Japan Science and Technology Agency	JPMJCR1874, 19H00660
Core Research for Evolutional Science and Technology	JPMJCR20T1

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title = "Heat current-driven topological spin texture transformations and helical q-vector switching",

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{\textquoteright}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 ∇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.",

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AU - Masell, Jan

AU - Karube, Kosuke

AU - Shindo, Daisuke

AU - Taguchi, Yasujiro

AU - Tokura, Yoshinori

AU - Yu, Xiuzhen

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

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