Oxyfluorides superconducting

Oxyfluorocuprates of rare-earth metals with low concentrations of fluorine exhibit tht properties of HTSCs [364], By slightly fluorinating certain HTSC materials, one car enhance Tc, and the content of the superconducting phase [365], and reduce AT] [366,367]. Apparently, attempts are being made to synthesize the simplest HTSC oxyfluorides of the Sr2Cu03 xFx type [368] using the simpler method of anodic oxidation of copper in certain solutions. 

It is clear from the examples presented so far that atomistic simulation can reveal important contrasts within and between families of superconducting cuprates. The final family of compounds we briefly examine in this chapter are those in the range Sr-Ca-Cu-O, beginning with SrCuC>2, the defect chemistry of which remains highly controversial despite the apparent simplicity of its structure, and concluding with the recently synthesized oxyfluorides. 

Synthesis, Structure and Superconducting/Magnetic Properties of Cu- and Mn-based Oxyfluorides... 

Figure 13.9 The dependence of optimal Tc vs. a-parameter for Hg-based superconducting Cu mixed oxides and oxyfluorides. (Reprinted with permission from Russ. Chem. Rev., A. M. Abakumov et. ai, 71, 5, 383 00 Copyright (2004) Royal Society of Chemistry.)...

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