Abstract
X-ray structural studies using single crystals have been performed for various concentrations x of intercalation compounds Fe x TiS 2 . Atomic arrangements of Fe atoms were found to be of short-range order in the spin-glass region and long-range order in the cluster-glass region. In x =0.15 (spin-glass), nearly spherical diffuse scattering was observed, whose maxima were at (1/2, 0, 1/2), (0, 1/2, 1/2), (1/2, 1/2, 1/2) and their equivalent positions. By means of an anomalous X-ray scattering technique, it was found that the short-range order of Fe atoms has a hexagonal symmetry. In x =1/4 (cluster-glass), \(2\sqrt {3}a\times 2a\times 2c\) superlattice reflection was observed, and the crystal symmetry changed to monoclinic with the space group C2/m. In x =1/3 (cluster-glass), \(\sqrt {3}a\times \sqrt {3}a\times 2c\) superlattice reflection was observed, and the space group was P\=31c.
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