Successive phase transitions and magnetization plateau in the spin-1 triangular-lattice antiferromagnet Ba2La2NiTe2O12 with small easy-axis anisotropy

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dc.contributor.authorSaito, Men_AU
dc.contributor.authorWatanabe, Men_AU
dc.contributor.authorKurita, Nen_AU
dc.contributor.authorMatsuo, Aen_AU
dc.contributor.authorKindo, Ken_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorJeschke, HOen_AU
dc.contributor.authorTanaka, Hen_AU
dc.date.accessioned2021-06-28T23:23:02Zen_AU
dc.date.available2021-06-28T23:23:02Zen_AU
dc.date.issued2019-08-22en_AU
dc.date.statistics2021-06-24en_AU
dc.description.abstractThe crystal structure and magnetic properties of the spin-1 triangular-lattice antiferromagnet Ba2La2NiTe2O12 are reported. Its crystal structure is trigonal R¯3, which is the same as that of Ba2La2NiW2O12 [Y. Doi et al., J. Phys.: Condens. Matter 29, 365802 (2017)]. However, the exchange interaction J/kB≃19 K is much greater than that observed in the tungsten system. At zero magnetic field, Ba2La2NiTe2O12 undergoes successive magnetic phase transitions at TN1=9.8 K and TN2=8.9 K. The ground state is accompanied by a weak ferromagnetic moment. These results indicate that the ground-state spin structure is a triangular structure in a plane perpendicular to the triangular lattice owing to the small easy-axis-type anisotropy. The magnetization curve exhibits the one-third plateau characteristic of a two-dimensional triangular-lattice Heisenberg-like antiferromagnet. Exchange constants are also evaluated using density functional theory (DFT). The DFT results demonstrate the large difference in the exchange constants between tellurium and tungsten systems and the good two-dimensionality of the tellurium system. ©2019 American Physical Societyen_AU
dc.identifier.articlenumber64417en_AU
dc.identifier.citationSaito, M., Watanabe, M., Kurita, N., Matsuo, A., Kindo, K., Avdeev, M., Jeschke, H. O., & Tanaka, H. (2019).Successive phase transitions and magnetization plateau in the spin-1 triangular-lattice antiferromagnet Ba2La2NiTe2O12 with small easy-axis anisotropy. Physical Review B, 100(6), 064417. doi:10.1103/PhysRevB.100.064417en_AU
dc.identifier.issn2469-9969en_AU
dc.identifier.issue6en_AU
dc.identifier.journaltitlePhysical Review Ben_AU
dc.identifier.urihttps://doi.org/10.1103/PhysRevB.100.064417en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10932en_AU
dc.identifier.volume100en_AU
dc.language.isoenen_AU
dc.publisherAmerican Physical Societyen_AU
dc.subjectPhase transformationsen_AU
dc.subjectMagnetismen_AU
dc.subjectAntiferromagnetismen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectSpecific heaten_AU
dc.subjectCrystal structureen_AU
dc.subjectTelluriumen_AU
dc.subjectTungstenen_AU
dc.titleSuccessive phase transitions and magnetization plateau in the spin-1 triangular-lattice antiferromagnet Ba2La2NiTe2O12 with small easy-axis anisotropyen_AU
dc.typeJournal Articleen_AU
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