This article is cited in 1 paper

CONDENSED MATTER

Upper critical field of cellular magnesium diboride

V. A. Grinenko

Russian Research Centre "Kurchatov Institute"

Abstract: A cellular superconducting material consisting of thin (1–20 μm) MgB_2−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 MgB_2−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.

PACS: 74.25.Op, 74.70.Ad

Received: 21.03.2007
Revised: 02.05.2007

 English version: Journal of Experimental and Theoretical Physics Letters, 2007, 85:12, 622–625

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