High-temperature cuprates applications

Since the discovery of high temperature superconductivity in cuprates, there has been intense interest in transition metal oxides with strongly layered, (quasi) two-dimensional (2D) crystal structures and electronic properties. For several years now alkali-metal intercalated layered cobaltates, particularly Na CoCL (NxCO)withx 0.50 — 0.75, have been pursued for their thermoelectric properties [1] IAX C0O2 is of course of great interest and importance due to its battery applications. The recent discovery[2] and confirmation[3-5] of superconductivity in this system, for x 0.3 when intercalated with H20, has heightened interest in the NxCO system. 

The discovery of cuprates exhibiting superconductivity at relatively high temperatures has opened up new prospects for the application of superconductivity in many areas, in particular in sensor systems and in electronics [13.1,... 

Numerous studies on fluorinated cuprates and manganites demonstrate that fluorination of the preformed complex oxides can effectively be used to adjust their properties for electronic applications. By fluorination, structural transformations can be induced, leading to compounds that cannot be obtained by a direct high-temperature solid state reaction. The directions of structural changes under fluorination depend on the nature of the fluorination reaction (anion insertion or replacement), the type of the crystallographic... 

In 1986, it was discovered that some cuprate-perovskite materials have critical temperatures above 90 K. These high-Tc superconductors renewed interest in the topic because of the prospects for improvement and potential room-temperature superconductivity. From a practical perspective, even 90 K is relatively easy to reach with liquid N2 (boiling point = 77.4 K), resulting in more experiments and applications (see also Section 1.2.4). 

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