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

  title={Negative thermal expansion and magnetoelastic coupling in the breathing pyrochlore lattice material LiGaCr4S8},
  author={Ganesh Pokharel and Andrew F. May and D. S. Parker and Stuart Calder and Georg Ehlers and Ashfia Huq and Simon A J Kimber and Hasitha Suriya Arachchige and L Poudel and Michael A. McGuire and David G. Mandrus and Andrew D. Christianson},
  journal={Physical Review B},
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… Expand

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