Superconducting films prepared by aerosol metal organic chemical vapour deposition on substrate with buffer layer

Авторы: Fröhlich K., Souc J., Rosová A., Machajdík D., Graboy I.E., Svetchnikov V.L., Figueras A., Weiss F.
Журнал: Superconductor Science and Technology
Том: 10
Номер: 9
Год издания: 1997
Издательство: IOP Publishing
Местоположение издательства: [Bristol, UK], England
Первая страница: 657
Последняя страница: 662
DOI: 10.1088/0953-2048/10/9/005
Аннотация: Superconducting YBa2Cu3O7 films with a CeO2 buffer layer were prepared by aerosol MOCVD on Al2O3 substrates. X-ray diffraction and highresolutionelectron microscopy revealed a high degree of epitaxy of the YBa2Cu3O7/CeO2 heterostructure without any traces of interfacial reaction.Although both YBa2Cu3O7 and CeO2 films grow in a relaxed state, additional strain is incorporated into the structure during cooling from the deposition temperature, which results in a decrease of the lattice parameters perpendicular to the substrate surface. The YBa2Cu3O7 films exhibit a critical temperature Tc(R=0) = 84–88 K with a critical current density of 3x10 9 A m−2 at T = 77.3 K. The angular dependence of the critical current at temperatures above 40 K in magnetic fields up to 0.5 T indicates that the YBa2Cu3O7 films grown by aerosol MOCVD on the CeO2/Al2O3substrate behave as three-dimensional anisotropic superconductors.
Добавил в систему: Грабой Игорь Эдвинович

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