Abstract
In polycrystalline samples of superconducting MgCNi3, the critical temperature and the specific heat were measured as a function of magnetic field. A Wertheimer–Helfand–Hohenberg (WHH)-like shape of Hc2(T) is observed. The Hc2(T) and specific heat data are discussed on a qualitative level in terms of effective single- and multi-band models based on an orbital assignment of the disjoint Fermi surface sheets (FSS) derived from LDA full potential electronic structure calculations.
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