Measurements of the surface critical current of YBa2Cu3O7− δ thin films: Probing the nonuniformity of their superconducting critical temperature along the c-axis
P Bernstein, J Mosqueira, J Siejka, F Vidal… - Journal of Applied …, 2010 - pubs.aip.org
The existence of nonsuperconducting zones in YBa 2 Cu 3 O 7− δ (YBCO) films below the
transition temperature to the nonresistive state can limit the performances of YBCO devices.
In this work, we present detailed measurements of the temperature dependence of the
critical surface current density of c-axis oriented epitaxial YBCO films, that suggest that their
superconducting critical temperature, T c, is modulated along the c-axis. This nonuniformity
of T c, that could be present in all YBCO films, seems also to be supported by …
transition temperature to the nonresistive state can limit the performances of YBCO devices.
In this work, we present detailed measurements of the temperature dependence of the
critical surface current density of c-axis oriented epitaxial YBCO films, that suggest that their
superconducting critical temperature, T c, is modulated along the c-axis. This nonuniformity
of T c, that could be present in all YBCO films, seems also to be supported by …
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