Magnetic soft modes in the distorted triangular antiferromagnet α-CaCr2O4

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dc.contributor.authorToth, Sen_AU
dc.contributor.authorLake, Ben_AU
dc.contributor.authorHradil, Ken_AU
dc.contributor.authorGuidi, Ten_AU
dc.contributor.authorRule, KCen_AU
dc.contributor.authorStone, MBen_AU
dc.contributor.authorIslam, ATMNen_AU
dc.date.accessioned2014-04-24T01:21:16Zen_AU
dc.date.available2014-04-24T01:21:16Zen_AU
dc.date.issued2012-09-19en_AU
dc.date.statistics2014-04-24en_AU
dc.description.abstractIn this Letter, we explore the phase diagram and excitations of a distorted triangular lattice anti-ferromagnet. The unique two-dimensional distortion considered here is very different from the "isosceles''- type distortion that has been extensively investigated. We show that it is able to stabilize a 120 degrees spin structure for a large range of exchange interaction values, while new structures are found for extreme distortions. A physical realization of this model is alpha-CaCr2O4, which has a 120 degrees structure but lies very close to the phase boundary. This is verified by inelastic neutron scattering which reveals unusual rotonlike minima at reciprocal space points different from those corresponding to the magnetic order. © 2012, American Physical Society.en_AU
dc.identifier.articlenumber127203en_AU
dc.identifier.citationToth, S., Lake, B., Hradil, K., Guidi, T., Rule, K. C., Stone, M. B., & Islam, A. T. M. N. (2012). Magnetic soft modes in the distorted triangular antiferromagnet α-CaCr2O4. Physical Review Letters, 109(12), Article Number 127203. doi:10.1103/PhysRevLett.109.127203en_AU
dc.identifier.govdoc4589en_AU
dc.identifier.issn0031-9007en_AU
dc.identifier.issue12en_AU
dc.identifier.journaltitlePhysical Review Lettersen_AU
dc.identifier.urihttp://dx.doi.org/10.1103/PhysRevLett.109.127203en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/5479en_AU
dc.identifier.volume109en_AU
dc.language.isoenen_AU
dc.publisherAmerican Physical Societyen_AU
dc.subjectSpinen_AU
dc.subjectMagnetismen_AU
dc.subjectAntiferromagnetismen_AU
dc.subjectNeutronsen_AU
dc.subjectSpectrometersen_AU
dc.subjectNeutron reactionsen_AU
dc.titleMagnetic soft modes in the distorted triangular antiferromagnet α-CaCr2O4en_AU
dc.typeJournal Articleen_AU
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