Incipient ferromagnetism in Tb2Ge2O7: application of chemical pressure to the enigmatic spin-liquid compound Tb2Ti2O7.

  title={Incipient ferromagnetism in Tb2Ge2O7: application of chemical pressure to the enigmatic spin-liquid compound Tb2Ti2O7.},
  author={Alannah M Hallas and J. -G. Cheng and {\'A}ngel M. Ar{\'e}valo-L{\'o}pez and Harlyn J. Silverstein and Y. T. Su and P M Sarte and H. D. Zhou and Eun Sang Choi and John Paul Attfield and Graeme M Luke and Christopher R Wiebe},
  journal={Physical review letters},
  volume={113 26},
After nearly 20 years of study, the origin of the spin-liquid state in Tb2Ti2O7 remains a challenge for experimentalists and theorists alike. To improve our understanding of the exotic magnetism in Tb2Ti2O7, we synthesize a chemical pressure analog: Tb2Ge2O7. Substitution of titanium by germanium results in a lattice contraction and enhanced exchange interactions. We characterize the magnetic ground state of Tb2Ge2O7 with specific heat, ac and dc magnetic susceptibility, and polarized neutron… 

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