کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1507279 | 993901 | 2015 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Improvement of critical parameters of YBa2Cu3O6.9 by low temperature treatment in the presence of water vapors Improvement of critical parameters of YBa2Cu3O6.9 by low temperature treatment in the presence of water vapors](/preview/png/1507279.png)
The effect of double thermal treatment at temperatures of 200 °C and 930 °C on the critical parameters of highly textured YBa2Cu3O6.9 ceramics has been examined. It has been shown that particles non-superconducting at T = 77 K, as well as planar stacking faults formed at low-temperature treatment in a humid atmosphere, are pinning centers of magnetic vortices. After recovery annealing (at 930 °C), the planar faults are partially preserved and serve as effective pinning centers in a magnetic field perpendicular to the c-axis. In addition, optimal double-annealing conditions have been found to significantly increase the critical current density up to the values jc ⩾ 104 A/cm2 in the external magnetic field (10 T), applied perpendicular to the c-axis.
Journal: Cryogenics - Volume 72, Part 1, December 2015, Pages 36–43