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Correlations between the structure and superconducting properties of MT-YBaCuO

Journal Article


Abstract


  • Comprehensive experimental results of fully oxidized (up to YBa2Cu3O6,9-7) melt-Textured YBaCuO materials with different microstructures are presented. These microstructures are built respectively: (1) with a high dislocations density but almost without twins (after high temperature treatment at 2 GPa) and (2) with a high twin density, but practically free from dislocations and stacking faults (after high temperature oxygenation at 10-16 MPa). It is shown that for attaining high critical current densities and fields of irreversibility (jc(H-c, 0 T)=9•104 A/cm2, H irr=9.7 T at 77 K), a high twin density in YBa2Cu3O6.9-7 matrix of MT-YBCO is required. The density of twins in fully oxidized materials depends on the distances between Y2BaCuO5 inclusions, larger twin densities are related to shorter distances between inclusions. The influence of phase composition of the initial powder mixtures on the distances between Y2BaCuO5 inclusions have been characterized and discussed.

Publication Date


  • 2020

Citation


  • Prikhna, T. A., Moshchill, V. E., Rabier, J., Chaud, X., Joulain, A., Pan, A. V., . . . Habisreuther, T. (2020). Correlations between the structure and superconducting properties of MT-YBaCuO. Journal of Physics: Conference Series, 1559(1). doi:10.1088/1742-6596/1559/1/012048

Scopus Eid


  • 2-s2.0-85088111924

Web Of Science Accession Number


Volume


  • 1559

Issue


  • 1

Abstract


  • Comprehensive experimental results of fully oxidized (up to YBa2Cu3O6,9-7) melt-Textured YBaCuO materials with different microstructures are presented. These microstructures are built respectively: (1) with a high dislocations density but almost without twins (after high temperature treatment at 2 GPa) and (2) with a high twin density, but practically free from dislocations and stacking faults (after high temperature oxygenation at 10-16 MPa). It is shown that for attaining high critical current densities and fields of irreversibility (jc(H-c, 0 T)=9•104 A/cm2, H irr=9.7 T at 77 K), a high twin density in YBa2Cu3O6.9-7 matrix of MT-YBCO is required. The density of twins in fully oxidized materials depends on the distances between Y2BaCuO5 inclusions, larger twin densities are related to shorter distances between inclusions. The influence of phase composition of the initial powder mixtures on the distances between Y2BaCuO5 inclusions have been characterized and discussed.

Publication Date


  • 2020

Citation


  • Prikhna, T. A., Moshchill, V. E., Rabier, J., Chaud, X., Joulain, A., Pan, A. V., . . . Habisreuther, T. (2020). Correlations between the structure and superconducting properties of MT-YBaCuO. Journal of Physics: Conference Series, 1559(1). doi:10.1088/1742-6596/1559/1/012048

Scopus Eid


  • 2-s2.0-85088111924

Web Of Science Accession Number


Volume


  • 1559

Issue


  • 1