Magnetic phases of skyrmion-hosting GaV&lt;sub&gt;4&lt;/sub&gt;S&lt;sub&gt;8-&lt;em&gt;y&lt;/em&gt;&lt;/sub&gt;Se&lt;em&gt;&lt;sub&gt;y&lt;/sub&gt;&lt;/em&gt; (&lt;em&gt;y&lt;/em&gt; = 0, 2, 4, 8) probed with muon spectroscopy

Franke, Kévin J.A.; Huddart, Benjamin M.; Hicken, Thomas J.; Xiao, Fan; Blundell, Stephen J.; Pratt, Francis L.; Crisanti, Marta; Barker, Joel A.T.; Clark, Stewart J.; Štefančič, Aleš; Hatnean, Monica Ciomaga; Balakrishnan, Geetha; Lancaster, Tom

doi:10.1103/PhysRevB.98.054428

Magnetic phases of skyrmion-hosting GaV₄S_8-ySe_y (y = 0, 2, 4, 8) probed with muon spectroscopy

Franke KJA, Huddart BM, Hicken TJ, Xiao F, Blundell SJ, Pratt FL, Crisanti M, Barker JAT, Clark SJ, Štefančič A, Hatnean MC, Balakrishnan G & Lancaster T

Citation

Franke, K. J. A., Huddart, B. M., Hicken, T. J., Xiao, F., Blundell, S. J., Pratt, F. L., … Lancaster, T. (2018). Magnetic phases of skyrmion-hosting GaV₄S_8-ySe_y (y = 0, 2, 4, 8) probed with muon spectroscopy. Physical Review B, 98(5), 054428 (9 pp.). https://doi.org/10.1103/PhysRevB.98.054428

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:5370

We present the results of a muon-spin spectroscopy investigation of GaV₄S_8-ySe_y with y = 0, 2, 4, and 8. Zero-field measurements suggest that GaV₄Se₈ and GaV₄S₈ 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 y = 2 and 4 materials showing glassy magnetic behavior at low temperature. The skyrmion lattice (SkL) phase is evident in the y = 0 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 GaV₄Se₈, 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.