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Candidate quantum spin ice in the pyrochlore Pr2Hf2O7

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Sibille, Romain, Lhotel, Elsa, Ciomaga Hatnean, Monica, Balakrishnan, Geetha, Fåk, Björn, Gauthier, Nicolas, Fennell, Tom and Kenzelmann, Michel (2016) Candidate quantum spin ice in the pyrochlore Pr2Hf2O7. Physical Review B, 94 (2). 024436 . doi:10.1103/PhysRevB.94.024436

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Official URL: http://dx.doi.org/10.1103/PhysRevB.94.024436

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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.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Nuclear spin, Ferromagnetism, Crystal field theory, Anisotropy
Journal or Publication Title: Physical Review B
Publisher: American Physical Society
ISSN: 2469-9950
Official Date: 27 July 2016
Dates:
DateEvent
27 July 2016Published
16 June 2016Accepted
Volume: 94
Number: 2
Article Number: 024436
DOI: 10.1103/PhysRevB.94.024436
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Copyright Holders: American Physical Society
Funder: Seventh Framework Programme (European Commission) (FP7), Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung [Swiss National Science Foundation] (SNSF), Engineering and Physical Sciences Research Council (EPSRC)
Grant number: 290605 COFUND, PSI-FELLOW 228464 MICROKELVIN (FP7), 200021 _ 140862, 200021 _ 138018, 200020 _ 162626 (SNSF), EP/M028771/1 (EPSRC)

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