Spin-gap opening accompanied by a strong magnetoelastic response in the S=1 magnetic dimer system Ba3BiRu2O9

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dc.contributor.authorMiiller, Wen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorZhou, Qen_AU
dc.contributor.authorStuder, AJen_AU
dc.contributor.authorKennedy, BJen_AU
dc.contributor.authorKearley, GJen_AU
dc.contributor.authorLing, CDen_AU
dc.date.accessioned2021-01-18T21:54:20Zen_AU
dc.date.available2021-01-18T21:54:20Zen_AU
dc.date.issued2011-12-15en_AU
dc.date.statistics2021-01-11en_AU
dc.description.abstractNeutron diffraction, magnetization, resistivity, and heat-capacity measurements on the 6H-perovskite Ba3BiRu2O9 reveal simultaneous magnetic and structural dimerization driven by strong magnetoelastic coupling. An isostructural but strongly displacive first-order transition on cooling through T∗=176 K is associated with a change in the nature of direct Ru–Ru bonds within Ru2O9 face-sharing octahedra. Above T∗, Ba3BiRu2O9 is an S=1 magnetic dimer system with intradimer exchange interactions J0/kB=320 K and interdimer exchange interactions J′/kB=−160 K. Below T∗, a spin-gapped state emerges with Δ≈220 K. Ab initio calculations confirm antiferromagnetic exchange within dimers, but the transition is not accompanied by long-range magnetic order. ©2011 American Physical Societyen_AU
dc.identifier.articlenumber220406en_AU
dc.identifier.citationMiiller, W., Avdeev, M., Zhou, Q., Studer, A. J., Kennedy, B. J., Kearley, G. J., & Ling, C. D. (2011) Spin-gap opening accompanied by a strong magnetoelastic response in the S=1 magnetic dimer system Ba3BiRu2O9. Physical Review B, 84(22), 220406. doi:10.1103/PhysRevB.84.220406en_AU
dc.identifier.issn2469-9969en_AU
dc.identifier.issue22en_AU
dc.identifier.journaltitlePhysical Review Ben_AU
dc.identifier.urihttps://doi.org/10.1103/PhysRevB.84.220406en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10252en_AU
dc.identifier.volume84en_AU
dc.language.isoenen_AU
dc.publisherAmerican Physical Societyen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectSpecific heaten_AU
dc.subjectMagnetic propertiesen_AU
dc.subjectPhase transformationsen_AU
dc.subjectExchange interactionsen_AU
dc.subjectAntiferromagnetismen_AU
dc.titleSpin-gap opening accompanied by a strong magnetoelastic response in the S=1 magnetic dimer system Ba3BiRu2O9en_AU
dc.typeJournal Articleen_AU
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