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Electron Microscopic Investigation of Post-Annealed Superconducting GdBa$_2$Cu$_3$O$_{7-δ}$ Thin Films on MgO

Grünewald, Lukas ORCID iD icon 1; Popov, Ruslan ORCID iD icon 2; Hänisch, Jens ORCID iD icon 2; Holzapfel, Bernhard ORCID iD icon 2; Gerthsen, Dagmar 1
1 Laboratorium für Elektronenmikroskopie (LEM), Karlsruher Institut für Technologie (KIT)
2 Institut für Technische Physik (ITEP), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

GdBa$_2$Cu$_3$O$_{7-δ}$ (GdBCO) is a promising high-temperature superconductor with potential application as coated conductor for power applications (e.g. transformers). However, further improvements in cost-effectiveness and superconducting properties are desired. The latter are influenced by O content, film texture, and film quality, where non-superconducting defects can effectively pin magnetic flux lines if they have favorable shape, size, and density. The O content in GdBCO can be set in-situ after film deposition or afterward by annealing in a different furnace (ex-situ). The correlation of oxygenation processes and defect formation/healing in GdBCO is not fully understood. In this work, we apply scanning transmission electron microscopy (STEM) to investigate the effect of different ex-situ oxygenation routes on the GdBCO microstructure.

Volltext §
DOI: 10.5445/IR/1000143835
Veröffentlicht am 17.03.2022
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Technische Physik (ITEP)
Laboratorium für Elektronenmikroskopie (LEM)
Publikationstyp Poster
Publikationsdatum 23.08.2021
Sprache Englisch
Identifikator KITopen-ID: 1000143835
HGF-Programm 38.05.03 (POF IV, LK 01) High Temperature Superconductivity
Veranstaltung Microscopy Conference (MC 2021), Online, 22.08.2021 – 26.08.2021
Schlagwörter GdBCO, TEM, PLD, MgO, EELS
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