AC susceptibility characterisation of Bi-Sr-Ca-Cu-O (2212) single crystals: annealing effects

作者：Moreno AJ; Leyva AG; Polla G; Levy P; Vega D; Manghi E

来源：Solid State Ionics, 1997, 99(3-4): 251-256.

DOI：10.1016/S0167-2738(97)00250-6

• superconductivity
• single crystal
• 2212 system
• annealing effect
• AC susceptibility

Single crystals of Bi2Sr2CaCu2Ox have been grown by directional solidification method in order to analyze annealing effects on critical superconducting temperature (T-c) by AC susceptibility measurements. Structural modifications were studied by X-ray diffraction. A decrease of the transition width was observed in samples treated in oxygen or argon atmospheres at 500 degrees C for 10 h. Higher T-c values were obtained for argon annealings. The magnitude of T-c changes and its correlation with c lattice parameter is found to be sample-dependent.

• 出版日期1997-8