Abstract
Bi2Sr2CaCu2O8 thin films have been deposited on MgO single crystal substrates by spin-coating a solution based on 2-ethylhexanoate precursors dissolved in xylene. Pyrolysis takes place between 200°C and 450°C and is accompanied by the release of 2-ethylhexanoic acid, CO2 and H2O vapour. Highly c-axis oriented Bi2Sr2CaCu2O8 as well as Er- or Ho-doped Bi2Sr2(Ca,Ln)Cu2O8 (Ln = Er, Ho) films were obtained after heat treatment at 840°C in air.
Highlights
Bi2Sr2CaCu2O8 thin films have been deposited on MgO single crystal substrates by spin-coating a solution based on 2-ethylhexanoate precursors dissolved in xylene
Coated conductor tapes based on REBa2Cu3O7 (RE = rare earth) thin films deposited on cube textured substrates can nowadays be produced in long lengths with remarkably high critical current densities in excess of 1 MA/cm2 at 77 K [1,2], which is more than three orders of magnitude higher than in YBa2Cu3O7 wires made by the Powder-in-Tube (PIT) technology [3,4,5]
We summarize our studies on the pyrolysis of a precursor solution based on 2-ethylhexanoates and on attempts at doping the films with Ho and Er
Summary
Coated conductor tapes based on REBa2Cu3O7 (RE = rare earth) thin films deposited on cube textured substrates can nowadays be produced in long lengths with remarkably high critical current densities (jc) in excess of 1 MA/cm at 77 K [1,2], which is more than three orders of magnitude higher than in YBa2Cu3O7 wires made by the Powder-in-Tube (PIT) technology [3,4,5] This large improvement is due to the decrease of the intergrain jc when the grain misorientation angle exceeds 10° [6].
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