Publication details for Professor Tom LancasterAli, N. Z., Williams, R. C., Xiao, F., Clark, S. J., Lancaster, T., Blundell, S. J., Sheptyakov, D. V. & Jansen, M. (2015). Magnetostructural relationship in the tetrahedral spin-chain oxide CsCoO2. Physical Review B 91(2): 024419.
- Publication type: Journal Article
- ISSN/ISBN: 1098-0121 (print), 1550-235X (electronic)
- DOI: 10.1103/PhysRevB.91.024419
- Further publication details on publisher web site
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Author(s) from Durham
We have investigated the structural and magnetic transitions in CsCoO2 using calorimetric measurements, neutron powder diffraction, density functional theory calculations, and muon-spin relaxation measurements. CsCoO2 exhibits three-dimensional long-range antiferromagnetic (AFM) order at 424 K, resulting in antiferromagnetic alignment of chains of ferromagnetically ordered Co-Co spin dimers. Although there is no change in magnetic structure around a structural transition at T∗=100 K, the resulting bifurcation of corner-shared Co-O-Co bond angles causes a weakening of the AFM interaction for one set of bonds along the chains. Consequently, the system undergoes a complex freezing out of relaxation processes on cooling.