High-superconducting critical current densities in YBa2Cu3O7/PrBa2Cu3O7 superlattices
- 23 September 1991
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 59 (13), 1626-1628
- https://doi.org/10.1063/1.106251
Abstract
Well‐ordered [(YBa2Cu3O7)nY/(PrBa2Cu3O7)nPr)]m superlattices with high superconducting critical temperatures were prepared by sequential reactive dc sputtering. The superconducting critical current density at 4.5 K reaches values as high as 1.1×107 A/cm2 for a sample with nY = 2 and nPr = 1 and 3.8×106 A/cm2 for nY = 1 and nPr = 3, indicating that the coupling of the CuO2 layers is not necessary for high‐jc values. The angular dependence jc(φ) is determined by the component of the magnetic field perpendicular to the a‐b planes and shows that these superlattices are two‐dimensional systems.Keywords
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