The Influence of Substrate Temperature of Seed Layer on the Structure and Superconducting Property of BaHfO{sub 3}-Doped Y{sub 0.5}Gd{sub 0.5}Ba{sub 2}Cu{sub 3}O{sub 7−δ} Film Prepared by Pulsed Laser Deposition

Journal Article · Wed May 15 00:00:00 EDT 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-018-4809-2· OSTI ID:22921299

Liu, Linfei; Wang, Wei; Zheng, Tong; Liu, Shunfan; Wang, Ying; Li, Yijie ^[1]

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1. Shanghai Jiao Tong University, School of Physics and Astronomy (China)

For various practical applications, excellent superconducting properties under magnetic field of REBa{sub 2}Cu{sub 3}O{sub 7−δ} (RE = rare earth elements (REBCO))-coated conductors are required, which can be fabricated by introducing artificial pinning centers, such as second-phase dopant. It is well known that BaMO{sub 3} (M = Zr, Sn, or Hf) can form self-organized nanorods in REBCO matrix and improve the critical current density (J{sub c}) under applied magnetic field. However, with increasing dopant level, the critical temperature T{sub c} and J{sub c} at 77 K in self-field decreased. In order to inhibit the degradation of the J{sub c} in self-field, we fabricated 5 mol% BaHfO{sub 3} (BHO)-doped Y{sub 0.5}Gd{sub 0.5}Ba{sub 2}Cu{sub 3}O{sub 7−δ} (YGBCO) seed layers on CeO{sub 2}-buffered IBAD-MgO tapes by pulse laser deposition (PLD) at a laser repetition of 10 Hz and different substrate temperature T{sub seed}, and subsequently deposited 5-mol% BHO-doped YGBCO upper layers at 160 Hz and higher substrate temperature. The effect of T{sub seed} on the quality of the 5-mol% BHO-doped YGBCO upper layer was investigated. With increasing T{sub seed} from 710 to 820 {sup ∘}C, the Δφ value of YGBCO (103) reflection first decreased and then increased, while the J{sub c} at 77 K increased with increasing T{sub seed} to 790 {sup ∘}C and decreased at higher T{sub seed}. The 5-mol% BHO-doped YGBCO layer with a seed layer deposited at 790 {sup ∘}C had the highest J{sub c} (77 K, self-field) of 4.0 MA/cm{sup 2}.

• OSTI ID: 22921299
• Journal Information: Journal of Superconductivity and Novel Magnetism, Vol. 32, Issue 5; Other Information: Copyright (c) 2019 Springer Science+Business Media, LLC, part of Springer Nature; Country of input: International Atomic Energy Agency (IAEA); ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
BARIUM COMPOUNDS
CRITICAL CURRENT
DOPED MATERIALS
ENERGY BEAM DEPOSITION
FILMS
GADOLINIUM COMPOUNDS
HAFNIUM COMPOUNDS
HIGH-TC SUPERCONDUCTORS
LASER RADIATION
LAYERS
MAGNETIC FIELDS
NANOPARTICLES
NANOSTRUCTURES
REFLECTION
SUBSTRATES
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS