Effect of oxygen stoichiometry variation on T<sub>c</sub> in Nd<sub>1.85</sub>Ce<sub>0.15</sub>CuO<sub>4- delta </sub>
G S Okram; Om Prakash; B D Padalia; D Chandrasekharam; A S Tamhanell; L C Gupta; G S Okram; Indian Inst. of Technol., Bombay, India; Om Prakash; Indian Inst. of Technol., Bombay, India; B D Padalia; Indian Inst. of Technol., Bombay, India; D Chandrasekharam; Indian Inst. of Technol., Bombay, India; A S Tamhanell; Indian Inst. of Technol., Bombay, India; L C Gupta; Indian Inst. of Technol., Bombay, India
Журнал:
Superconductor Science and Technology
Дата:
1992-09-01
Аннотация:
The oxygen vacancy parameter, delta , in electron-doped superconducting Nd<sub>1.85</sub>Ce<sub>0.15</sub>CuO<sub>4- delta </sub>, has been varied by changing the sample-processing conditions. A T<sub>c</sub>-onset value of 19 K was obtained by quenching alone. T<sub>c</sub> onset as high as 24 K, T<sub>c</sub>(R=0)=17 K and Delta T(90%-10%)=3 K have been achieved for delta =0.05 in argon-annealed single-phase Nd<sub>1.85</sub>Ce<sub>0.15</sub>CuO<sub>4- delta </sub> samples.
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