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Size Effect of Insulating Nano-Inclusions in Y–Ba–Cu–O Bulk Superconductors Fabricated by Seeded Infiltration Growth

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Abstract

We have conducted an experimental study on the effect of the pinning centers size on the superconducting properties in textured YBCO samples. In this work, we investigated the effectiveness of the addition of an insulating inclusion on the superconducting and magnetic properties of textured YBCO bulk materials. The purpose of this study was to ascertain whether the size of artificial pinning centers is able to affect the superconducting properties of our samples. To this effect insulating nano-pinning centers with two different particle size distributions of about 20 nm and 130 nm have been successfully incorporated within YBCO matrix by slight doping with nano-particle alumina dispersions. The microstructure and superconducting properties were investigated by scanning electron microscopy (SEM) and SQUID. The results indicate that slight inclusions of nano-alumina can enhance the flux-pinning capability of samples. This study underlines the dependence of the pinning force on the size of the pinning centers.

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Authors and Affiliations

  1. Department of Physics, Faculty of Sciences, Zarzouna, 7021, Bizerte, Tunisia

    Nahed Moutalbi & Ali M’chirgui

  2. Systems and Applied Mechanics Laboratory, LASMAP, Polytechnic School of Tunisia, Rue El Khawarezmi, La Marsa 743, Tunis, Tunisia

    Ali M’chirgui

  3. CRISMAT Laboratory, CNRS UMR 6508 ENSICAEN/CNRS et Université de Caen Basse-Normandie, 6 Bd Maréchal Juin, 14050, Caen Cedex 04, France

    Jacques G. Noudem

Authors
  1. Nahed Moutalbi
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  2. Ali M’chirgui
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  3. Jacques G. Noudem
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Correspondence to Ali M’chirgui.

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Moutalbi, N., M’chirgui, A. & Noudem, J.G. Size Effect of Insulating Nano-Inclusions in Y–Ba–Cu–O Bulk Superconductors Fabricated by Seeded Infiltration Growth. J Supercond Nov Magn 24, 365–369 (2011). https://doi.org/10.1007/s10948-010-0996-1

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  • DOI: https://doi.org/10.1007/s10948-010-0996-1

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