Transverse field muon-spin rotation signature of the skyrmion lattice phase in Cu2OSeO3

TL;DR

This study uses transverse field muon-spin rotation to detect and analyze the skyrmion lattice phase in Cu2OSeO3, revealing its quasistatic nature and providing a method to distinguish it from other magnetic phases.

Contribution

It demonstrates how TF muSR can identify the skyrmion lattice phase and estimates its quasistatic timescale, advancing magnetic phase detection techniques.

Findings

TF muSR signals differ in the skyrmion lattice phase

The skyrmion lattice is quasistatic with tau > 100 ns

Simulations support muon sensitivity to the skyrmion lattice

Abstract

We present the results of transverse field (TF) muon-spin rotation (muSR) measurements on Cu2OSeO3, which has a skyrmion lattice (SL) phase. We measure the response of the TF muSR signal in that phase along with the surrounding ones, and suggest how the phases might be distinguished using the results of these measurements. Dipole field simulations support the conclusion that the muon is sensitive to the SL via the TF lineshape and, based on this interpretation, our measurements suggest that the SL is quasistatic on a timescale tau > 100 ns.