Magnetic phases of skyrmion-hosting GaV 4 S 8 − y Se y ( y = 0 , 2 , 4 , 8 ) probed with muon spectroscopy
We have published a new paper in Physical Review B 98, 054428 (2018) ( https://doi.org/10.1103/PhysRevB.98.054428 ).
We present the results of a muon-spin spectroscopy investigation of with , and 8. Zero-field measurements suggest that and have distinct magnetic ground states, with the latter material showing an anomalous temperature dependence of the local magnetic field. It is not possible to evolve the magnetic state continuously between these two systems, with the intermediate and 4 materials showing glassy magnetic behavior at low temperature. The skyrmion lattice (SkL) phase is evident in the and 8 materials through an enhanced response of the muon-spin relaxation to the emergent dynamics that accompany the SkL. For our polycrystalline samples of , this enhanced dynamic response is confined to a smaller region of the magnetic field-temperature phase diagram than the previous reports of the SkL in single crystals.