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Flux-pinning properties of YBa2Cu3O7−x multilayered films with Y2O3 and ZnO nanoparticle inclusions

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Abstract

We investigated the flux-pinning properties of YBa2Cu3O7−x (YBCO) films in which Y2O3 and ZnO nanoparticles were uniformly embedded by using the pulsed laser deposition (PLD) technique. Y2O3 and ZnO nanoparticles with average sizes of 10–30 nm and with different densities by changing the number of nanoparticle layers were introduced in a YBCO matrix in the form of a multilayered structure. The total thickness of the YBCO superconducting layers was kept to be 250 nm. Dilute do** was found to be effective for both Y2O3 and ZnO nanoparticles. For Y2O3 do**, critical current density (J c ) enhancements over a wide range of fields were obtained in 1- and 5-layer doped samples, while weak J c enhancements and a better field dependence of J c were found in the YBCO film with 1 layer of ZnO. Based on an analysis of surface morphology, the transition temperature (T c ), and J c , we discuss the difference between the two types of nanoparticles as flux-pinning centers.

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Authors and Affiliations

  1. Department of Physics, Chungbuk National University, Cheongju, 361-763, Korea

    Byeongwon Kang, C. H. Wie, D. H. Tran & W. B. K. Putri

  2. Department of Physics, Yeungnam University, Gyeongsan, 712-749, Korea

    T. J. Hwang & D. H. Kim

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  1. Byeongwon Kang
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  2. C. H. Wie
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  3. D. H. Tran
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  4. W. B. K. Putri
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  5. T. J. Hwang
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  6. D. H. Kim
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Correspondence to Byeongwon Kang.

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Kang, B., Wie, C.H., Tran, D.H. et al. Flux-pinning properties of YBa2Cu3O7−x multilayered films with Y2O3 and ZnO nanoparticle inclusions. Journal of the Korean Physical Society 60, 1911–1914 (2012). https://doi.org/10.3938/jkps.60.1911

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