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NaCaN i2 F7: A frustrated high-temperature pyrochlore antiferromagnet with S=1 N i2+

Author(s): Krizan, Jason W.; Cava, Robert Joseph

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dc.contributor.authorKrizan, Jason W.-
dc.contributor.authorCava, Robert Joseph-
dc.date.accessioned2020-10-27T18:31:29Z-
dc.date.available2020-10-27T18:31:29Z-
dc.date.issued2015-07en_US
dc.identifier.citationKrizan, JW, Cava, RJ. (2015). : A frustrated high-temperature pyrochlore antiferromagnet with. Physical Review B, 92 (1), 10.1103/PhysRevB.92.014406en_US
dc.identifier.issn1098-0121-
dc.identifier.urihttp://arks.princeton.edu/ark:/88435/pr1dz3q-
dc.descriptionPhysical Review B - Condensed Matter and Materials Physics. Volume 92, Issue 1, 7 July 2015, Article number 014406.en_US
dc.description.abstractNaCaNi2F7 is an insulating, frustrated A2B2F7 pyrochlore with magnetic S=1Ni2+ on the pyrochlore B site. Nonmagnetic Na and Ca are disordered on the A site. Magnetic susceptibility measurements made on an oriented single crystal, grown in a floating zone furnace, show isotropic behavior at temperatures between 5 and 300K, with an effective moment of 3.7μB/Ni. Despite displaying a large Curie-Weiss theta (-129K), spin-ordering-related features are not seen in the susceptibility or specific heat until a spin glass transition at 3.6K. This yields an empirical frustration index of f=-θCW/Tf≈36. The spin glass behavior is substantiated by a shift of the freezing temperature with frequency in the ac susceptibility, bifurcation in the dc susceptibility, and by a broad maximum in the magnetic specific heat. The observations as made on large single crystals suggest that NaCaNi2F7 is likely a realization of a frustrated spin 1 pyrochlore antiferromagnet with weak bond disorder. © 2015 American Physical Society.en_US
dc.format.extent92.1:014406-1 -014406-6en_US
dc.language.isoenen_US
dc.relation.ispartofPhysical Review Ben_US
dc.rightsFinal published version. This is an open access article.en_US
dc.titleNaCaN i2 F7: A frustrated high-temperature pyrochlore antiferromagnet with S=1 N i2+en_US
dc.typeJournal Articleen_US
dc.identifier.doidoi:10.1103/PhysRevB.92.014406-
dc.date.eissued2015-07-07en_US
dc.identifier.eissn1550-235X-
pu.type.symplectichttp://www.symplectic.co.uk/publications/atom-terms/1.0/journal-articleen_US

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