1. Reentrant Phase Diagram of Yb2Ti2O7 in a ⟨111⟩ Magnetic Field.
- Author
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Scheie, A., Kindervater, J., Säubert, S., Duvinage, C., Pfleiderer, C., Changlani, H. J., Zhang, S., Harriger, L., Arpino, K., Koohpayeh, S. M., Tchernyshyov, O., and Broholm, C.
- Subjects
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MAGNETIC fields , *YTTERBIUM compounds , *TITANIUM compounds - Abstract
We present a magnetic phase diagram of rare-earth pyrochlore Yb2Ti2O7 in a ⟨111⟩ magnetic field. Using heat capacity, magnetization, and neutron scattering data, we show an unusual field dependence of a first-order phase boundary, wherein a small applied field increases the ordering temperature. The zero-field ground state has ferromagnetic domains, while the spins polarize along ⟨111⟩ above 0.65 T. A classical Monte Carlo analysis of published Hamiltonians does account for the critical field in the low T limit. However, this analysis fails to account for the large bulge in the reentrant phase diagram, suggesting that either long-range interactions or quantum fluctuations govern low field properties. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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