Preferred Orientation Contribution to the Anisotropic Normal State Resistivity in Superconducting Melt-Cast Processed Bi2Sr2CaCu2O8+δ

Materials

卷:10

Luca Lutterotti¹  Aline Dellicour²  Benedicte Vertruyen²  Bachir Ouladdiaf³  Mark O. Rikel⁴  Alain Pautrat⁵  Daniel Chateigner⁵ 

[1] Department of Industrial Engineering, University of Trento, via sommarive, 9-38123 Trento, Italy;

[2] GREENMAT, CESAM Research Unit, Institute of Chemistry, University of Liege, Sart-Tilman, 4000 Liege, Belgium;

[3] Institut-Laue-Langevin, Bd. Jules Horowitz, 38042 Grenoble, France;

[4] Nexans Superconductors, 30179 Hannover, Germany;

[5] Normandie Université, CRISMAT-ENSICAEN-UCN UMR 6508 CNRS, 6 Bd. Maréchal Juin, 14050 Caen, France;

关键词: texture;    neutron diffraction;    superconductor;    Bi2Sr2CaCuO8;    anisotropy;    resistivity;   

DOI  :  10.3390/ma10050534

来源: DOAJ

【 摘 要 】

We describe how the contribution of crystallographic texture to the anisotropy of the resistivity of polycrystalline samples can be estimated by averaging over crystallographic orientations through a geometric mean approach. The calculation takes into account the orientation distribution refined from neutron diffraction data and literature values for the single crystal resistivity tensor. The example discussed here is a melt-cast processed Bi2Sr2CaCu2O8+δ (Bi-2212) polycrystalline tube in which the main texture component is a <010> fiber texture with relatively low texture strength. Experimentally-measured resistivities along the longitudinal, radial, and tangential directions of the Bi-2212 tube were compared to calculated values and found to be of the same order of magnitude. Calculations for this example and additional simulations for various texture strengths and single crystal resistivity anisotropies confirm that in the case of highly anisotropic phases such as Bi-2212, even low texture strengths have a significant effect on the anisotropy of the resistivity in polycrystalline samples.

【 授权许可】

Unknown