Single-Crystal Cerium Hydrides

Early studies on polycrystalline samples of lanthanum and cerium hydrides by Stalinski (1957b, 1959) indicated that these materials become semiconductors as the trihydride composition is approached. More recent studies on single crystals of cerium hydride by Libowitz and Pack (1969b) showed a sharp increase in resistivity as the hydride composition approached CeH2 illustrated in fig. 26.10. As mentioned in section 5.1, samples in which H/Ce<2.7 showed metallic behavior. However, samples with H/Ce > 2.8 exhibited typical semiconductor behavior with a linear increase in resistivity with reciprocal temperature. Clearly, there is a metal-to-semiconductor transition in cerium hydride at an... 

Libowitz, G.G. and J.G. Pack, 1967, The Growth and Some Properties of Cerium Hydride Single Crystals, in Proceedings of the International Conference on Crystal Growth, Boston, Mass. June 1966 (Pergamon Press, N.Y.) pp. 129-132. 

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