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Superconducting layer in the 2nd generation superconducting wires can also be grown by thermal evaporation of constituent metals, rare-earth element, barium, and copper. Prusseit provides an overview of the thermal evaporation process used to deposit high-quality YBCO films.
Yttrium barium copper oxide (YBCO) is a family of crystalline chemical compounds that display high-temperature superconductivity; it includes the first material ever discovered to become superconducting above the boiling point of liquid nitrogen [77 K (−196.2 °C; −321.1 °F)] at about 93 K (−180.2 °C; −292.3 °F).
Unit cell of YBCO. Rare-earth barium copper oxide (ReBCO [1]) is a family of chemical compounds known for exhibiting high-temperature superconductivity (HTS). [2] ReBCO superconductors have the potential to sustain stronger magnetic fields than other superconductor materials.
For example, YBCO and BSCCO can alternatively be referred to as Y123 and Bi2201/Bi2212/Bi2223 depending on the number of layers in each superconducting block (n). The superconducting transition temperature has been found to peak at an optimal doping value (p=0.16) and an optimal number of layers in each superconducting block, typically n=3.
For example, YBCO and BSCCO can alternatively be referred to as "Y123" and Bi2201/Bi2212/Bi2223 depending on the number of layers in each superconducting block (n). The superconducting transition temperature has been found to peak at an optimal doping value ( p =0.16) and an optimal number of layers in each superconducting block, typically n =3.
The table below shows some of the parameters of common superconductors.X:Y means material X doped with element Y, T C is the highest reported transition temperature in kelvins and H C is a critical magnetic field in tesla.
Recent development of HTS wire made of YBCO with a superconducting transition temperature of around 90 K shows promise.Typically, the higher the superconducting transition temperature, the higher the maximum current density the superconductor can sustain before Cooper pair breakdown.
Quantum vortices in a 200-nm-thick YBCO film imaged by scanning SQUID microscopy [1] In superconductivity , a type-II superconductor is a superconductor that exhibits an intermediate phase of mixed ordinary and superconducting properties at intermediate temperature and fields above the superconducting phases.