Nature Materials· 2015Q1
Néel-type skyrmion lattice with confined orientation in the polar magnetic semiconductor GaV4S8
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- Q1SCImago
- 2015year
Short summary
A Néel-type skyrmion lattice (SkL) was discovered in the polar magnetic semiconductor GaV4S8, exhibiting an orientation confined to the magnetic easy axis and existing over an unusually broad temperature range.
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Key points
- Discovery of a Néel-type skyrmion lattice (SkL) in the polar magnetic semiconductor GaV4S8.
- The SkL in GaV4S8 has an orientation confined to the magnetic easy axis, independent of external magnetic fields.
- This SkL exists over an unusually broad temperature range compared to other bulk crystals.
- The Néel-type SkL is described as a superposition of spin cycloids, contrasting with the Bloch-type SkL in chiral magnets (spin helices).
AI-generated from the title and abstract; the full text is not read.
Abstract
Following the early prediction of the skyrmion lattice (SkL)--a periodic array of spin vortices--it has been observed recently in various magnetic crystals mostly with chiral structure. Although non-chiral but polar crystals with Cnv symmetry were identified as ideal SkL hosts in pioneering theoretical studies, this archetype of SkL has remained experimentally unexplored. Here, we report the discovery of a SkL in the polar magnetic semiconductor GaV4S8 with rhombohedral (C3v) symmetry and easy axis anisotropy. The SkL exists over an unusually broad temperature range compared with other bulk crystals and the orientation of the vortices is not controlled by the external magnetic field, but instead confined to the magnetic easy axis. Supporting theory attributes these unique features to a new Néel-type of SkL describable as a superposition of spin cycloids in contrast to the Bloch-type SkL in chiral magnets described in terms of spin helices.
The authors' abstract, as published at the source. Nature Materials, 2015 · DOI ↗
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Field: Condensed Matter Physics
Condensed Matter PhysicsPhysics and Astronomy