Abstract
Abstract
Substitution of Y for Ca in the Bi2Sr2CaCu2O8+δ
(Bi-2212) system is known to effectively change the hole carrier density. In this paper, we report the growth and characterization of Y-substituted Bi-2212 whisker crystals. The evaluated Y content in the whiskers increased as we increased the nominal Y-ratio in the Bi–Sr–Ca–Y–Cu–Te precursor. The X-ray diffraction patterns of whiskers aligned on a glass plate only showed (00l) Bragg peaks of the Bi-2212 phase, indicating that the grown whiskers are single crystalline. The c-axis lattice parameter showed a monotonic decrease with Y-substitution. The resistivity of Y-substituted whiskers showed a systematic decrease in superconducting transition temperature and an increase in normal resistivity, suggesting that the hole carrier density was controlled via Y-substitution. Based on these results, we propose that Bi-2212 with various carrier concentrations can be easily obtained by growing Y-substituted whiskers. Furthermore, such whiskers with controlled T
c might be useful for microelectronic applications such as terahertz oscillators.
Subject
General Physics and Astronomy,Physics and Astronomy (miscellaneous),General Engineering
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献