Candidate quantum spin ice in the pyrochlore Pr2Hf2O7 | |
Article | |
关键词: COULOMB PHASE; TRANSITION; OXIDES; LIQUID; STATE; ORDER; FIELD; | |
DOI : 10.1103/PhysRevB.94.024436 | |
来源: SCIE |
【 摘 要 】
We report the low temperature magnetic properties of the pyrochlore Pr2Hf2O7. Polycrystalline and single-crystal samples are investigated using time-of-flight neutron spectroscopy and macroscopic measurements, respectively. The crystal-field splitting produces a non-Kramers doublet ground state for Pr3+, with Ising-like anisotropy. Below 0.5 K ferromagnetic correlations develop, which suggests that the system enters a spin-ice-like state associated with the metamagnetic behavior observed at mu H-0(c) similar to 2.4 T. In this regime, the development of a discrete inelastic excitation in the neutron spectra indicates the appearance of spin dynamics that are likely related to cooperative quantum fluctuations.
【 授权许可】
Free