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    Development and Characterization of P-doped Ba-122 Superconducting Tapes

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    Type
    Article
    Authors
    Contarino, D.
    Löhnert, C.
    Johrendt, D.
    Genovese, Alessandro
    Bernini, C.
    Malagoli, A.
    Putti, M.
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Date
    2016-11-29
    Online Publication Date
    2016-11-29
    Print Publication Date
    2017-06
    Permanent link to this record
    http://hdl.handle.net/10754/622532
    
    Metadata
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    Abstract
    Among the recently discovered Fe-based superconducting compounds, the Ba-122 phase has proved to be the more attracting for the development of powder in tube (PIT) processed conductors. In fact, after some years of development, critical current densities ($J_{c}$) of about $10^{5} A/cm^{2}$ at 4.2 K and magnetic fields up to 10 T have been obtained in$(Ba_{0.6} K_{0.4}) Fe_{2} As_{2}$, PIT wires and tapes. To develop a safe upscaling method, the synthesis of the powders is a crucial point. In order to avoid the use of highly reactive K we have developed $BaFe_{2}(P_{1-x}As_{x})_{2}$ PIT tapes. This compound has proved to be very stable and in form of crystals and thin films exhibits excellent critical current: We succeeded in manufacturing PIT tapes with this phase with $J_{c}$ values of about $10^{3}A/cm^{2}$ at 4.2K in self-field. Detailed microstructural and chemical investigations of the samples have been performed by high-resolution TEM, scanning TEM, and electron energy loss spectrometry analysis. A deformation network inside the grains that can induce strong pinning has been observed. However, chemical inhomogeneities at the grain boundaries are also present, which limit the transport current.
    Citation
    Contarino D, Lohnert C, Johrendt D, Genovese A, Bernini C, et al. (2017) Development and Characterization of P-doped Ba-122 Superconducting Tapes. IEEE Transactions on Applied Superconductivity 27: 1–4. Available: http://dx.doi.org/10.1109/TASC.2016.2633386.
    Publisher
    Institute of Electrical and Electronics Engineers (IEEE)
    Journal
    IEEE Transactions on Applied Superconductivity
    DOI
    10.1109/TASC.2016.2633386
    Additional Links
    http://ieeexplore.ieee.org/document/7762128/
    ae974a485f413a2113503eed53cd6c53
    10.1109/TASC.2016.2633386
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division

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