Magnetic Structure of CsCoCl_3

概要

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Neutron diffraction measurements were carried out on single crystals ofCsCoCl., a quasi-one-dimensional antiferromagnet of Ising-like spins, in thelong range ordered region. The determined magnetic structure at 4.2 K is com-posed of antiferromagnetic stacking of ferrimagnetic c-plane with three sublatticesas determined by Melamud et at. The spins are aligned along c-axis and wereevaluated to be 3.11 p. at 0 K by extrapolation. Unusual temperature dependenceof magnetic reflection intensity was observed and interpreted as a partial dis-ordering transition in which one of the three sublattices in a c-plane loses itsmagnetization above 13.5 K resulting in antiferromagnetic c-planes. This transi-lion is discussed in connection with the antiferro-ferrimagnetic transition in thetriangular Ising lattice. The critical exponent of the magnetization was found tobe 0.34 around the N<Set temperature 20.82 K.
社団法人日本物理学会の論文
1978-03-15