%0 Journal Article
%T The magneto-structural relationship in the tetrahedral spin chain oxide CsCoO$_2$
%A N. Z. Ali
%A R. C. Williams
%A F. Xiao
%A S. J. Clark
%A T. Lancaster
%A S. J. Blundell
%A D. V. Sheptyakov
%A M. Jansen
%J Physics
%D 2014
%I arXiv
%R 10.1103/PhysRevB.91.024419
%X We have investigated the structural and magnetic transitions in CsCoO$_2$ using calorimetric measurements, neutron powder diffraction (NPD), density functional theory (DFT) calculations and muon-spin relaxation ($\mu$SR) measurements. CsCoO$_2$ 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.
%U http://arxiv.org/abs/1410.3686v1