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

@article{Hallas2014IncipientFI,
  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},
  year={2014},
  volume={113 26},
  pages={
          267205
        }
}
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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References

SHOWING 1-10 OF 81 REFERENCES
Magnetic structure in the spin liquid Tb2Ti2O7 induced by a [111] magnetic field : Search for a magnetization plateau
We have studied the field-induced magnetic structures of Tb2Ti2O7 pyrochlore by single-crystal neutron diffraction under a field applied along the [111] axis, up to H=12 T and down to T=40 mK. We…
LETTER TO THE EDITOR: Low temperature magnetic properties of frustrated pyrochlore ferromagnets Ho2Sn2O7 and Ho2Ti2O7
AC and DC magnetic susceptibilities have been measured on frustrated pyrochlore ferromagnets Ho2Sn2O7 and Ho2Ti2O7 at temperatures down to 100 mK. In the AC magnetic susceptibility, a dramatic drop…
Low-temperature magnetization in geometrically frustrated Tb2Ti2O7
The nature of the low temperature ground state of the pyrochlore compound Tb2Ti2O7 remains a puzzling issue. Dynamic fluctuations and short-range correlations persist down to 50 mK, as evidenced by…
Magnetoelastic excitations in the pyrochlore spin liquid Tb2Ti2O7.
TLDR
It is suggested that Tb2Ti2O7 is aptly named a "magnetoelastic spin liquid" and that the hybridization of the excitations suppresses both magnetic ordering and the structural distortion.
Field-induced order and spin waves in the pyrochlore antiferromagnet Tb2Ti207.
TLDR
High resolution time-of-flight neutron scattering measurements on Tb( 2)Ti(2)0(7) reveal a rich low temperature phase diagram in the presence of a magnetic field applied along, which supports spin wave excitations indicative of continuous, rather than Ising-like, spin degrees of freedom.
Low-temperature phases of the pyrochlore compound Tb 2 Ti 2 O 7
Low-temperature magnetic states of the pyrochlore compound Tb 2 Ti 2 O 7 with a geometrical frustration have been determined by measuring the specific heat, the susceptibility, and the residual…
Low-temperature low-field phases of the pyrochlore quantum magnet Tb2Ti2O7.
TLDR
Evidence is found for a new magnetic phase of Tb2Ti2O7 below about 140 mK in zero magnetic field, characterized by frequency- and amplitude-dependent susceptibility and extremely slow spin dynamics, suggesting that the second phase is a quantum kagome ice.
Structural Fluctuations in the spin-liquid state of Tb2Ti2O7.
TLDR
High-resolution x-ray scattering measurements on single crystal Tb2Ti2O7 reveal finite structural correlations at low temperatures and are consistent with the development of fluctuations above a cooperative Jahn-Teller, cubic-tetragonal phase transition at very low temperatures.
Pressure and field induced magnetic order in the spin liquid Tb2Ti2O7 as studied by single crystal neutron diffraction.
TLDR
The magnetic phase diagram under pressure shows a strong increase of the Néel temperature with the field, which can be tuned by the anisotropic pressure component.
Long-range order and spin-liquid states of polycrystalline Tb2+xTi2-xO7+y
Low-temperature states of polycrystalline samples of a frustrated pyrochlore oxide Tb2+xTi2 xO7+y have been investigated by specific heat, magnetic susceptibility, and neutron scattering experiments.…
...
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2
3
4
5
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