Abstract
Synthesis of YBa2Cu4O8 superconductor usually requires oxygen pressure greater than 20 MPa and very long heating schedules at high temperatures. Here we report synthesis of YBa2Cu4O8 superconductor by the standard solid‐state reaction between the precursors BaCu2O3 and Y2O3 in the presence of alkali nitrate. NaNO3, under ambient O2 pressure. The resulting sample showed zero resistance at 78 K. The presence of 124 was confirmed by high‐resolution X‐ray diffraction studies. Irreversibility of oxygen weight loss was studied by thermogravimetric analysis and differential thermal analysis.
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