The influence of low-temperature annealings on the structural and superconducting properties of Bi 2212 and Bi 2201 whiskers |
| |
Authors: | J I Gorina G A Kalyuzhnaja M V Golubkov V V Rodin N N Sentjurina V A Stepanov S G Chernook |
| |
Institution: | (1) Lebedev Physical Institute, Russian Academy of Sciences, Leninskiĭ pr. 53, Moscow, 119991, Russia |
| |
Abstract: | The influence of post-growth short-term low-temperature annealings (O2, 400°C, 5–15 min) on the composition, crystal structure, and superconductivity of Bi2Sr2CaCu2O8 + δ and Bi2Sr2CuO6 + δ oxycuprate whiskers freely grown in gas cavities has been investigated. The optimal conditions for growth in closed gas cavities in a flux and post-growth annealing in oxygen were found, making it possible to obtain high-quality superconducting Bi 2212 and Bi 2201 whiskers in a wide doping range (from heavily underdoped to optimally doped) with a small rocking curve half-width (~0.1°–0.2°) and narrow superconducting transition (ΔT = 1.5–2 K). |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|