학술논문
Candidate quantum spin ice in the pyrochlore Pr2 Hf2 O7 .
Document Type
Article
Author
Source
Subject
*PYROCHLORE
*PRASEODYMIUM
*QUANTUM spin models
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Language
ISSN
2469-9950
Abstract
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 μ0Hc∼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. [ABSTRACT FROM AUTHOR]