Ferromagnetic Ordering Along the Hard Axis in the Kondo Lattice YbIr₃Ge₇

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dc.contributor.authorRai, B. K.
dc.contributor.authorStavinoha, M.
dc.contributor.authorBanda, J.
dc.contributor.authorHafner, D.
dc.contributor.authorBenavides, Katherine A.
dc.contributor.authorSokolov, D. A.
dc.contributor.authorChan, Julia Y.
dc.contributor.authorBrando, M.
dc.contributor.authorHuang, C. -L
dc.contributor.authorMorosan, E.
dc.contributor.utdAuthorBenavides, Katherine A.
dc.contributor.utdAuthorChan, Julia Y.
dc.date.accessioned2019-12-18T22:15:42Z
dc.date.available2019-12-18T22:15:42Z
dc.date.created2019-03-18
dc.descriptionDue to copyright restrictions full text access from Treasures at UT Dallas is restricted to current UTD affiliates until 2020-03-18 (use the provided Link to Article).
dc.description.abstractFerromagnetic Kondo lattice compounds are far less common than their antiferromagnetic analogs. In this Rapid Communication, we report the discovery of a ferromagnetic Kondo lattice compound, YbIr₃Ge₇. As in almost all ferromagnetic Kondo lattice systems, YbIr₃Ge₇ shows magnetic order with moments aligned orthogonal to the crystal electric field (CEF) easy axis. YbIr₃Ge₇ is unique in that it is the only member of this class of compounds that crystallizes in a rhombohedral structure with a trigonal point symmetry of the magnetic site, and it lacks broken inversion symmetry at the local moment site. The ac magnetic susceptibility, magnetization, and specific heat measurements show that YbIr₃Ge₇ has a Kondo temperature TK≈14 K and a Curie temperature T_{C}=2.4K. Ferromagnetic order occurs along the crystallographic [100] hard CEF axis despite the large CEF anisotropy of the ground-state Kramers doublet with a saturation moment along [001] almost four times larger than the one along [100]. This implies that a mechanism which considers the anisotropy in the exchange interaction to explain the hard-axis ordering is unlikely. On the other hand, the broad second-order phase transition at T_{C} favors a fluctuation-induced mechanism. © 2019 American Physical Society.
dc.description.departmentSchool of Natural Sciences and Mathematics
dc.description.sponsorshipGordon and Betty Moore Foundation EPiQS Initiative through Grant No. GBMF 4417, 5305; Deutsche Forschungsgemeinschaft (DFG) Project No. BR4110/1-1; National Science Foundation under Grant No. DMR-1700030.
dc.identifier.bibliographicCitationRai, B. K., M. Stavinoha, J. Banda, D. Hafner, et al. 2019. "Ferromagnetic ordering along the hard axis in the Kondo lattice YbIr₃Ge₇." Physical Review B 99(12): art. 121109(R), doi: 10.1103/PhysRevB.99.121109
dc.identifier.issn2469-9950
dc.identifier.issue12
dc.identifier.urihttps://hdl.handle.net/10735.1/7140
dc.identifier.volume99
dc.language.isoen
dc.publisherAmerican Physical Society
dc.relation.urihttps://dx.doi.org/10.1103/PhysRevB.99.121109
dc.rights©2019 American Physical Society
dc.source.journalPhysical Review B
dc.subjectAnisotropy
dc.subjectAntiferromagnetism
dc.subjectCrystallography
dc.subjectElectric fields
dc.subjectFerromagnetic materials
dc.subjectFerromagnetism
dc.subjectIridium compounds
dc.subjectMagnetic susceptibility
dc.subjectSpecific heat
dc.subjectYtterbium compounds
dc.subjectRhombohedral structures
dc.subjectGermanium compounds
dc.titleFerromagnetic Ordering Along the Hard Axis in the Kondo Lattice YbIr₃Ge₇
dc.type.genrearticle

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