Chemistry of Superconductor Materials: Preparation, by C. W. Gardiner, P. Zoller

By C. W. Gardiner, P. Zoller

This thorough evaluate of the chemistry of excessive Tc superconductors presents vast insurance of the structural and artificial solid-state chemistry of oxide superconductors in addition to gigantic reference fabric on characterization equipment. Written by way of 27 experts within the box, the ebook fulfills a necessity for a condensed, single-source reference. it will likely be quintessential for researchers and for these unexpected with structural and artificial solid-state chemistry of superconductors.

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Extra resources for Chemistry of Superconductor Materials: Preparation, Chemistry, Characterization and Theory (Materials Science and Process Technology Series)

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32 Chemistry of Superconductor Materials This atomic arrangement leads to octahedral coordination about each cation and anion. In oxide systems, metallic-conducting materials occur when the cations are low valent transition metals. This is the case for TiO, VO, and NbO, all are room temperature metallic conductors crystallizing with the NaCl structure, or one closely derived from it, as in the case of NbO which has ordered metal and oxygen vacancies. We have already mentioned (6) the report of “near-zero” resistivity in NbO by Meissner in 1933.

He suggested that a conjugated polyene, a long-chained organic molecule, might become superconducting (with a T, > 300 K) if it contained some appropriately polarizable side-groups. This announcement set off an army of organic chemists in search of “room-temperature” organic superconductors. The success rate was very poor, yielding at best only a few metallic organic conductors possessing low resistivity at 1 K. tetracyanoquinodimethane salt. It was then realized that an electron donor (generating a cation) could be coupled with an electron acceptor (forming an anion) to yield a metallic conducting salt or compound.

8 63 TIO. 3oW03 hexag. 58 65 TIo. 3oW03 hexag. 14 63 sno. 19W03 tetrag. 21W03 hexag . 3 57 snO. 24w03 hexag . 8 60 oxyf luorides. 4 66 (filament& plate) Cs,WO374 C~xLiyWO3,xFx+y "MolybdenumEkonze'l Systems. 5Mo03 tetrag. 6 18 Bronze11Systems. 3Re03 hexag. 9Re03 tetrag.

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