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arXiv:1802.00158 (cond-mat)
[Submitted on 1 Feb 2018 (v1), last revised 15 Apr 2018 (this version, v2)]

Title:Negative thermal expansion and magnetoelastic coupling in the breathing pyrochlore lattice material LiGaCr4S8

Authors:G. Pokharel, A. F. May, D. S. Parker, S. Calder, G. Ehlers, A. Huq, S. A. J. Kimber, H. Suriya Arachchige, L. Poudel, M. A. McGuire, D. Mandrus, A. D. Christianson
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Abstract:The physical properties of the spinel LiGaCr4S8 have been studied with neutron diffraction, X-ray diffraction, magnetic susceptibility and heat capacity measurements. The neutron diffraction and synchrotron X-ray diffraction data reveal negative thermal expansion (NTE) below 111(4) K. The magnetic susceptibility deviates from Curie-Weiss behavior with the onset of NTE. At low temperature a broad peak in the magnetic susceptibility at 10.3(3) K is accompanied by the return of normal thermal expansion. First principles calculations find a strong coupling between the lattice and the simulated magnetic ground state. These results indicate strong magnetoelastic coupling in LiGaCr4S8.
Subjects: Other Condensed Matter (cond-mat.other); Materials Science (cond-mat.mtrl-sci)
Cite as: arXiv:1802.00158 [cond-mat.other]
  (or arXiv:1802.00158v2 [cond-mat.other] for this version)
  https://doi.org/10.48550/arXiv.1802.00158
Journal reference: Phys. Rev. B 97, 134117 (2018)
Related DOI: https://doi.org/10.1103/PhysRevB.97.134117

Submission history

From: Ganesh Pokharel [view email]
[v1] Thu, 1 Feb 2018 05:27:35 UTC (1,090 KB)
[v2] Sun, 15 Apr 2018 19:07:15 UTC (823 KB)
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