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Reentrant Phase Diagram of Yb2Ti2O7 in a [111] Magnetic Field



A. Scheie, J. Kindervater, S. Saubert, C. Duvinage, C. Pfleiderer, H. J. Changlani, S. Zhang, Leland Harriger, K. Arpino, S. M. Koohpayeh, Collin L. Broholm


We present a 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 0.65T. While a classical Monte Carlo analysis of published short-range-interaction Hamiltonians does account for the critical field in the low T limit, it fails to account for the lobed phase diagram, suggesting that either long-range interactions or quantum fluctuations govern low field properties.
Physical Review Letters


rare earth, pyrochlore, neutron scattering, magnetism


Scheie, A. , Kindervater, J. , Saubert, S. , Duvinage, C. , Pfleiderer, C. , Changlani, H. , Zhang, S. , Harriger, L. , Arpino, K. , Koohpayeh, S. and Broholm, C. (2017), Reentrant Phase Diagram of Yb<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> in a [111] Magnetic Field, Physical Review Letters, [online], (Accessed June 13, 2024)


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Created September 21, 2017, Updated October 12, 2021