Upper critical field of cellular magnesium diboride |
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| Authors: | V A Grinenko |
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| Institution: | (1) Russian Research Centre Kurchatov Institute, pl. Akademika Kurchatova 1, Moscow, 123182, Russia |
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| Abstract: | A cellular superconducting material consisting of thin (1–20 μm) MgB2?x layers and magnesium granules of about 100 μm has been produced. The critical temperature T c of this superconductor decreases with the thickness of the MgB2?x layers. In unalloyed magnesium diboride, the curvature of the temperature dependence of the upper critical field H c2(T) changes gradually from downward to pronounced upward as the temperature T c decreases from 38 to 36 K. |
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