Neutron Scattering Study of a One-Dimensional Ising-Like Antiferromagnet CsCoCl₃. I. Instantaneous Correlation

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Instantaneous spin correlations (Remark: Graphics omitted.) in CsCoCl₃ have been studied by means of quasi-elastic neutron scattering technique and well defined plane-like intensity distribution characteristic for 1D system has been observed. At temperatures higher than 30 K, the observed temperature variation of (Remark: Graphics omitted.) is in good agreement with the rigorous solution for the 1D Ising antiferromagnet with |J|⁄k=75 K. When the temperature is decreased, 3D critical scattering consistent with the previously worked model can be observed at two Néel points T_N1=21.3 K and T_N2=9.2 K.