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Reentrant Phase Diagram of $\rm{Yb_2Ti_2O_7}$ in $\langle 111 \rangle$ Magnetic Field

Reentrant Phase Diagram of $\rm{Yb_2Ti_2O_7}$ in $\langle 111 \rangle$ Magnetic Field

Authors :
Scheie, A.
Kindervater, J.
Säubert, S.
Duvinage, C.
Pfleiderer, C.
Changlani, H. J.
Zhang, S.
Harriger, L.
Arpino, K.
Koohpayeh, S. M.
Tchernyshyov, O.
Broholm, C.
Source :
Phys. Rev. Lett. 119, 127201 (2017)
Publication Year :
2017

Abstract

We present a magnetic phase diagram of rare-earth pyrochlore $\rm{Yb_2Ti_2O_7}$ in a $\langle 111 \rangle$ 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 $\langle 111 \rangle$ above 0.65T. 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.<br />Comment: 5 pages, 5 pages supplementary information

Details

Database :
arXiv
Journal :
Phys. Rev. Lett. 119, 127201 (2017)
Publication Type :
Report
Accession number :
edsarx.1703.06904
Document Type :
Working Paper
Full Text :
https://doi.org/10.1103/PhysRevLett.119.127201