Low Temperature Annealing Effect in La1.85Ca1.15Cu2O6 Superconductor
作者： Takeshi SAKURAI SEIJI ADACHI , YUJI YAEGASHI , H YAMAUCHI , None
DOI: 10.1007/978-4-431-68305-6_66
关键词:
摘要: The annealing conditions were investigated to synthesize high-quality samples of superconducting La1.85Ca1.15Cu2O6. We found that the at low temperatures is effective for increasing Meissner volume fraction. Ceramic prepared by a solid state reaction. ceramic bar sample annealed 1090°C 100h in Ar-20%O2 gas 2000atm using an O2-HIP technique showed superconductivity T c~50K. Its fraction 5K was as small 3%. Additional treatments performed on temperatures, 600°C 40h high-pressure oxygen or 450°C 10 days 1-atm oxygen. In both cases, increased about three times.
springer.com
sci-hub.st 参考文章(4)
Kyoichi Kinoshita, Hiroyuki Shibata, Tomoaki Yamada, Crystal structure and superconducting properties of La1.85Ca1.15Cu2O6+δ Physica C: Superconductivity. ,vol. 176, pp. 433- 440 ,(1991) , 10.1016/0921-4534(91)90046-2
Kyoichi Kinoshita, Hiroyuki Shibata, Tomoaki Yamada, High-pressure synthesis of superconducting Physica C-superconductivity and Its Applications. ,vol. 171, pp. 523- 527 ,(1990) , 10.1016/0921-4534(90)90267-I
R. J. Cava, B. Batlogg, R. B. van Dover, J. J. Krajewski, J. V. Waszczak, R. M. Fleming, W. F. Peck, L. W. Rupp, P. Marsh, A. C. W. P. James, L. F. Schneemeyer, Superconductivity at 60 K in La2-xSrxCaCu2O6: the simplest double-layer cuprate Nature. ,vol. 345, pp. 602- 604 ,(1990) , 10.1038/345602A0
Takeshi Sakurai, Toru Yamashita, H. Yamauchi, Shoji Tanaka, Synthesis of superconducting La2−xSrxCaCu2O6 using O2‐hot‐isostatic‐pressing techniques Journal of Applied Physics. ,vol. 69, pp. 3190- 3193 ,(1991) , 10.1063/1.348560