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- W2614895049 abstract "Achieving high critical current density (Jc) under a high magnetic field in Fe based superconductors is indispensable for practical applications. Here we report that high critical current density over 1 MA cm−2 in high field (13 T) can be achieved in BaZrO3 (BZO) incorporated Ba(Fe,Co)2As2 (Co-Ba122) thin film grown on CaF2 substrate using pulsed laser deposition. The magnetization Jc of Co-Ba122 thin film incorporated with 2 mol.% BZO reaches 1.3 MA cm−2 (Hǁc, 13 T and 4.2 K), 14 times higher than that of pure Co-Ba122 thin film. Transmission electron microscopy observation revealed that BZO forms nanorods of ∼4 nm in average diameter with mean separation of 10–11 nm which corresponds to a matching field of about 17–20 T. Incorporating BZO in Co-Ba122 thin films led to a strong vortex pinning effect and a significant enhancement of Jc because a high density of BZO nanorods could form in the superconducting matrix without significant degradation of Tc, and the diameter of BZO nanorods is approximately twice the coherence length of Co-Ba122 (ξab(0) ∼ 2.5 nm) which is the optimal size as pinning centers." @default.
- W2614895049 created "2017-05-26" @default.
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- W2614895049 date "2017-07-05" @default.
- W2614895049 modified "2023-10-15" @default.
- W2614895049 title "High critical current density over 1 MA cm<sup>−2</sup>at 13 T in BaZrO<sub>3</sub>incorporated Ba(Fe,Co)<sub>2</sub>As<sub>2</sub>thin film" @default.
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- W2614895049 doi "https://doi.org/10.1088/1361-6668/aa73f5" @default.
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