Magnetic soft modes in the distorted triangular antiferromagnet alpha-CaCr(2)O(4)

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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.accessioned2014-03-06T23:39:23Zen_AU
dc.date.available2014-03-06T23:39:23Zen_AU
dc.date.issued2012-09-19en_AU
dc.date.statistics2014-03-07en_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-CaCr(2)O(4), 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 The American Physical Societyen_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 alpha-CaCr(2)O(4). Physical Review Letters, 109(12), 127203. doi:10.1103/PhysRevLett.109.127203en_AU
dc.identifier.govdoc4572en_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/10238/5243en_AU
dc.identifier.volume109en_AU
dc.language.isoenen_AU
dc.publisherAmerican Physical Societyen_AU
dc.subjectSpectrometersen_AU
dc.subjectMagnetsen_AU
dc.subjectMagnetismen_AU
dc.subjectNerve cellsen_AU
dc.subjectAntiferromagnetismen_AU
dc.subjectPhononsen_AU
dc.titleMagnetic soft modes in the distorted triangular antiferromagnet alpha-CaCr(2)O(4)en_AU
dc.typeJournal Articleen_AU
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