All-electrical detection of skyrmion lattice state and chiral surface twists

Abstract

We study the high-temperature phase diagram of the chiral magnetic insulator Cu${}_2$OSeO${}_3$ by measuring the spin-Hall magnetoresistance (SMR) in a thin Pt electrode. We find distinct changes in the phase and amplitude of the SMR signal at critical lines separating different magnetic phases of bulk Cu${}_2$OSeO${}_3$. The skyrmion lattice state appears as a strong dip in the SMR phase. A strong enhancement of the SMR amplitude is observed in the conical spiral state, which we explain by an additional symmetry-allowed contribution to the SMR present in non-collinear magnets. We demonstrate that the SMR can be used as an all-electrical probe of chiral surface twists and skyrmions in magnetic insulators.

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Cited by in corpus (4)

• All-electrical Magnon Transport Experiments in Magnetically Ordered Insulators
• Helitronics for classical and unconventional computing
• Strain driven antiferromagnetic exchange interaction in SrMnO${}_3$ probed by phase shifted Spin Hall magnetoresistance
• Observation of distorted tilted conical phase at the surface of a bulk chiral magnet with resonant elastic x-ray scattering