Abstract
Complete series of solid solutions exist in the mixed oxide pyrochlore system, Er 3+2 (V 3+1−x Fe 3+ x )4/3 W 3/6+2 O7, with the crystal structure changing from cubic to rhombohedral atx=0·25. The compounds are semiconductors at 300 K exhibitingp- orn-type behaviour depending on the value ofx. The observed resistivity and Seebeck coefficient data as a function of temperature have been interpreted in terms of a hopping mechanism.
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Forms part of the Ph.D. Thesis to be submitted by MAS to IIT, Madras.
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Subramanian, M.A., Aravamudan, G. & Subba Rao, G.V. Solid state studies on rare earth mixed oxide pyrochlores Er2(V1−x Fe x )4/3 W2/3O7 . Bull. Mater. Sci. 2, 201–206 (1980). https://doi.org/10.1007/BF02745409
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DOI: https://doi.org/10.1007/BF02745409