Ternary compounds superconducting

Fulde, P., and J. Keller, 1982, in Superconductivity in Ternary Compounds, Superconductivity and Magnetism, eds M.B. Maple and 0. Fischer (Springer, Berlin) p. 249. 

Yvon, K. (1982) in Superconductivity in Ternary Compounds I, Eds. O. Fischer and M. B. Maple, Springer-Verlag, Berlin, pp. 25-86. 

The chemistry of copper, especially in oxide compounds, is presented from a crysto-chemical viewpoint. The known binary and ternary compounds are reviewed and the important features of geometry, covalency, ionic radii, and bond length are discussed in great depth. This section concludes with a brief description of the Bednorz and Muller discovery, followed by Chu and co-workers important discovery of superconductivity at 95 K in the so-called "1-2-3" copper-oxide system. 

After the initial attempt to prepare alloy and interstitial superconductors, several ceramists, chemists, and materials scientists joined the group of physicists and metallurgists in search of other superconducting materials. These scientists turned to ternary compounds and to more complex systems. From the mid-60 s to the mid-70 s, several new "inorganic materials" were found to exhibit the superconducting phenomenon. 

O. Fischer and M.B. Maple, Eds., "Superconductivity in Ternary Compounds I, Structural, Electronic and Lattice Properties , Springer-Yerlag, New York (1982). 

Chevrel, R. Sergent, M. In Superconductivity in Ternary Compounds I Fischer,... 

Maple, M.B., and0. Fischer (eds), 1982, Superconductivity in Ternary Compounds II, Superconductivity and Magnetism (Springer, Berlin). 

Point defects are an important part of the work in this paper. There are many reasons for the formation of point defects in minerals and their presence can exert important perturbations on the properties of the material (4). Point defects are formed because of the thermally driven intrinsic disorder in a lattice, the addition of aliovalent impurities or dopants, the presence of metal-nonmetal nonstoichiometry, and the creation of nonideal cation ratios. The first three source of defects are well-known from binary compounds but the last is unique to ternary compounds. Ternary compounds are much more complex than the binary compounds but they also have gained a great deal of attention because of the variety of important behavior they exhibit including now the presence of superconductivity at high temperatures. The point defects can be measured by introducing probe ions into the lattice. 

Klose, W. Andersen, O. K. in Superconductivity in Ternary Compounds, Fisher,... 

R. Chevrel, M. Sergent, In Superconductivity of Ternary Compounds, O. Fischer, M.B. Maple (eds.), Springer-Verlag, Heidelberg, New York 1982, p 25. 

Fischer, O. Maple, M. B., Eds. Topics in Current Physics, Vol, 32 Superconductivity in Ternary Compounds I Structural, Electronic, and Lattice Properties Springer-verlag, New York, 1982. 

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