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Magnetic properties and crystal field in Pr2Zr2O7
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Bonville, P., Guitteny, S., Gukasov, A., Mirebeau, I., Petit, S., Decorse, C., Ciomaga Hatnean, Monica and Balakrishnan, Geetha (2016) Magnetic properties and crystal field in Pr2Zr2O7. Physical Review B (Condensed Matter and Materials Physics), 94 (13). 134428 . doi:10.1103/PhysRevB.94.134428 ISSN 1098-0121.
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Official URL: http://dx.doi.org/10.1103/PhysRevB.94.134428
Abstract
In this work, we revisit the crystal field acting on the non-Kramers Pr3+ ion (4f2) in the quantum spin ice candidate Pr2Zr2O7 using both a standard calculation restricted to the ground spin-orbit multiplet and intermediate coupling states in the full basis of the f 2 configuration. Analysis of the thermal variation of the polycrystal magnetic susceptibility and of the local susceptibilities χ⊥ and χ// determined by means of polarized neutron diffraction experiments reveals that the effective antiferromagnetic exchange is strongly depleted at low temperature with respect to its high-temperature value.We then discuss the influence of crystal field imperfections arising from residual strains, which are especially important for a non-Kramers ion. We find that they are an essential ingredient to account for the very low temperature M(H) magnetization curves, showing that the saturation is not achieved even at 8 T. Furthermore, as possible candidates to qualitatively understand the Curie-like behavior observed below 0.5 K, we discuss the influence of the magnetic hyperfine interaction.
Item Type: | Journal Article | ||||||
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Subjects: | Q Science > QC Physics | ||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
Library of Congress Subject Headings (LCSH): | Nuclear spin, Crystal field theory, Antiferromagnetism | ||||||
Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||||
Publisher: | American Physical Society | ||||||
ISSN: | 1098-0121 | ||||||
Official Date: | 27 October 2016 | ||||||
Dates: |
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Volume: | 94 | ||||||
Number: | 13 | ||||||
Article Number: | 134428 | ||||||
DOI: | 10.1103/PhysRevB.94.134428 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||
Copyright Holders: | American Physical Society | ||||||
Date of first compliant deposit: | 24 April 2017 | ||||||
Date of first compliant Open Access: | 24 April 2017 | ||||||
Funder: | Science and Technology Facilities Council (Great Britain) (STFC), Engineering and Physical Sciences Research Council (EPSRC) | ||||||
Grant number: | EP/M028771/1 (EPSRC) |
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