Inter-granular effects at high magnetic fields of cuprate and iron chalcogenide superconducting materials

The weak links effects are one of the main challenges for effective power applications of high temperature superconducting materials. Studies of these effects help for their better understanding and subsequent improvement. An overview analysis of the intergranular properties of cuprate (Y0.8Ca0.2Ba2Cu3O7-δ) and iron-based chalcogenide (FeSe0.5Te0.5) polycrystalline samples was carried out, by means of series of electro-transport experiments at different magnetic fields. The temperature evolution of the Josephson coupling and intrinsic superconductivity effects for the both systems was constructed. The FeSe0.5Te0.5 compound shows very stable and superior behavior compared to Y0.8Ca0.2BCO up to the highest magnetic fields (14T) used. We have explored FeSe0.5Te0.5 Josephson weak links influence (as a non-linear process) over the resistive transition using different AC current amplitudes and applying the sensitive AC transport third harmonics technique.

Keywords

Barium compounds, Calcium compounds, Chalcogenides, Condensed matter physics, Copper compounds, High temperature applications, Iron, Iron compounds, Magnetic fields, Organic superconducting materials, Selenium compounds, Tellurium compounds, Textures, Different-magnetic fields, High magnetic fields, High-temperature superconducting materials, Intergranular properties, Polycrystalline samples, Resistive transition, Temperature evolution, Transport experiments, Iron-based Superconductors

URI

https://doi.org/10.34657/3608
https://oa.tib.eu/renate/handle/123456789/4979

Citation

Buchkov, K., Valkovski, M., Gajda, D., Nenkov, K., & Nazarova, E. (2019). Inter-granular effects at high magnetic fields of cuprate and iron chalcogenide superconducting materials. 1186(1). https://doi.org//10.1088/1742-6596/1186/1/012004

Collections

Physik

License

CC BY 3.0 Unported

https://creativecommons.org/licenses/by/3.0/

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