Short-Range Order and Long-Range Order of Fe Atoms in a Spin-Glass Phase and a Cluster-Glass Phase of Intercalation Compounds FexTiS2

Y. Kuroiwa, M. Nishimura, R. Nakajima, H. Abe1 and Y. Noda

Faculty of Science, Chiba University, Yayoi, Chiba 263, Japan
1Institute of Applied Physics, University of Tsukuba, Tsukuba 305, Japan

J.Phys.Soc.Jpn, Vol.36, pp4278-4281(1994).

X-ray structual studies using single crystals have been performed for various concentrations x of intercalation compounds FexTiS2. Atomic arrangements of Fe atoms were found to be of short-range order in the spin-glass reagion and long-range order in the cluster-glass reagion. 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 * 2a * 2c superlattice reflection was observed, and crystal symmetry changed to monoclinic with the space group C2/m. In x=1/3 (cluster-glass), sqrt(3)a * sqrt(3)a * 2c superlattice reflection was observed, and the space group was P31c. 

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ab@nda.ac.jp
Department of Materials Science and Engineering
National Defense Academy

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