Superconducting BaHfO3-GdBa2Cu3O7 Nanocomposite Thin Films: Influence of Growth Temperature and Deposition Rate on Transport Properties

Superconducting GdBa 2 Cu 3 O 7 films with 2.5 wt% of BaHfO 3 were deposited by pulsed laser deposition using an Nd:YAG laser (λ = 355 nm), and their structural and electrical properties were investigated in dependence of substrate temperature T sub and deposition rate (i.e., laser repetition rate v...

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Published inIEEE transactions on applied superconductivity Vol. 29; no. 5; pp. 1 - 5
Main Authors Popov, Ruslan, Erbe, Manuela, Hanisch, Jens, Holzapfel, Bernhard
Format Journal Article
LanguageEnglish
Published New York IEEE 01.08.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Barium compounds
Critical current density
Electrical properties
flux pinning
GdBCO
High-temperature superconductors
irreversibility field
Lasers
Magnetic fields
Nanocomposites
Nanoparticles
Neodymium lasers
Plasma
Pulsed laser deposition
Pulsed lasers
Semiconductor lasers
Substrates
Superconductivity
Temperature dependence
Thin films
YAG lasers
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Summary:Superconducting GdBa 2 Cu 3 O 7 films with 2.5 wt% of BaHfO 3 were deposited by pulsed laser deposition using an Nd:YAG laser (λ = 355 nm), and their structural and electrical properties were investigated in dependence of substrate temperature T sub and deposition rate (i.e., laser repetition rate v dep ). The irreversibility lines show the strongest shift toward higher magnetic fields at intermediate T sub and lower v dep . The self-field J c decreases by a factor of 2 compared with the pristine sample, but the situation improves in the high field region. The angular dependence of J c at 1, 5, and 9 T shows a large c-axis peak at 180 o , which indicates strongly correlated pinning at BHO nanocolumns.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2019.2892039