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arXiv · 2104.09912

Investigation of the magnetic ground state of GaV$_4$S$_8$ using powder neutron diffraction

S. J. R. Holt·C. Ritter·M. R. Lees·G. Balakrishnan
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Abstract

The magnetic ground state of polycrystalline N\'eel skyrmion hosting material GaV$_4$S$_8$ has been investigated using ac susceptibility and powder neutron diffraction. In the absence of an applied magnetic field GaV$_4$S$_8$ undergoes a transition from a paramagnetic to a cycloidal state below 13~K and then to a ferromagnetic-like state below 6~K. With evidence from ac susceptibility and powder neutron diffraction, we have identified the commensurate magnetic structure at 1.5 K, with ordered magnetic moments of $0.23(2)~\mu_{\mathrm{B}}$ on the V1 sites and $0.22(1)~\mu_{\mathrm{B}}$ on the V2 sites. These moments have ferromagnetic-like alignment but with a 39(8)$^{\circ}$ canting of the magnetic moments on the V2 sites away from the V$_4$ cluster. In the incommensurate magnetic phase that exists between 6 and 13 K, we provide a thorough and careful analysis of the cycloidal magnetic structure exhibited by this material using powder neutron diffraction.

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S. J. R. Holt, C. Ritter, M. R. Lees, G. Balakrishnan. 2021-04-20. Investigation of the magnetic ground state of GaV$_4$S$_8$ using powder neutron diffraction. https://doi.org/10.1088/1361-648x/abf9bb

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