Macroscopic Manifestation of Domain-wall Magnetism and Magnetoelectric Effect in a Néel-type Skyrmion Host

Abstract

We report a magnetic state in GaV${}_4$Se${}_8$ which emerges exclusively in samples with mesoscale polar domains and not in polar mono-domain crystals. Its onset is accompanied with a sharp anomaly in the magnetic susceptibility and the magnetic torque, distinct from other anomalies observed also in polar mono-domain samples upon transitions between the cycloidal, the Néel-type skyrmion lattice and the ferromagnetic states. We ascribe this additional transition to the formation of magnetic textures localized at structural domain walls, where the magnetic interactions change stepwise and spin textures with different spiral planes, hosted by neighbouring domains, need to be matched. A clear anomaly in the magneto-current indicates that the domain-wall-confined magnetic states also have strong contributions to the magnetoelectric response. We expect polar domain walls to commonly host such confined magnetic edge states, especially in materials with long wavelength magnetic order.

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Cited by in corpus (13)

• Field-driven metamorphoses of isolated skyrmions within the conical state of cubic helimagnets
• Anisotropy driven response of skyrmion lattice in MnSc${}_2$S${}_4$ to applied magnetic fields
• Cooperative cluster-Jahn-Teller effect as a possible route to antiferroelectricity
• Magnetic avalanche of non-oxide conductive domain walls
• Stability of Néel-type skyrmion lattice against oblique magnetic fields in GaV${}_4$S${}_8$ and GaV${}_4$Se${}_8$
• Magnetic anisotropy of individual maghemite mesocrystals
• Quasimolecular $J_{\mathrm{tet}}$=3/2 moments in the cluster Mott insulator GaTa${}_4$Se${}_8$
• Magnetoentropic mapping and computational modeling of cycloids and skyrmions in the lacunar spinels GaV${}_4$S${}_8$ and GaV${}_4$Se${}_8$
• Antipolar transitions in GaNb${}_4$Se${}_8$ and GaTa${}_4$Se${}_8$
• Dynamics of asymmetrically deformed skyrmion driven by internal forces and strain force in a flower-shaped magnetic nanostructure
• Jahn-Teller driven quadrupolar ordering and spin-orbital dimer formation in GaNb${}_4$Se${}_8$
• Magnetic structure of polar magnet GaV${}_4$Se${}_8$ with Néel-type skyrmion lattice probed by ${}^{51}$V NMR
• Optical, dielectric, and magnetoelectric properties of ferroelectric and antiferroelectric lacunar spinels