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Transient increase of Tc and Jc in superconducting/metallic heterostructures

MPG-Autoren
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Fischer,  P.       
Max Planck Institute for Medical Research, Max Planck Society;

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https://www.sciencedirect.com/science/article/pii/S0254058421001735/pdfft?md5=2c2ada69f20db7e59969e753e895b2d5&pid=1-s2.0-S0254058421001735-main.pdf
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Zitation

Ionescu, A., Bihler, M., Simmendinger, J., Miksch, C., Fischer, P., Cristiani, G., et al. (2021). Transient increase of Tc and Jc in superconducting/metallic heterostructures. Materials Chemistry and Physics, 263: 124390, pp. 1-7. doi:10.1016/j.matchemphys.2021.124390.


Zitierlink: https://hdl.handle.net/21.11116/0000-000B-2B84-0
Zusammenfassung
The presence of a metallic layer can influence the properties of high-temperature superconductors underneath. We investigate the influence of metallic structures deposited in form of nanoparticles or continuous layers by electron beam evaporation or ion beam sputtering on the properties of Y1Ba2Cu3O7-x (YBCO) thin films. To generally avoid diffusion of metal atoms an additional barrier layer is introduced. Detailed measurements of the magnetic moment of the superconductor as a function of temperature and magnetic field have been performed using SQUID magnetometry. It is found that the modification of the superconducting properties of coated YBCO strongly depends on the deposition method of the metal on top rather than the type of metal (Ni or Ag), its magnetic properties (ferromagnetic or paramagnetic) or its morphology (nanoparticles or thin film). The main result is a transient increase of the critical temperature Tc and critical current density Jc that was observed for samples prepared by electron beam evaporation.