The suppression of superconductivity in Mn substituted MgCNi3
Abstract
We report the effect of doping Mn in the isostructural MgCNi3-xMnx (x = 0-0.05) compounds. Magnetic susceptibility, resistivity, magneto-resistance, and specific heat studies show evidence of localized moments and Kondo effect in samples with x≠0. The rapid suppression of superconductivity ( -21K/at.% Mn) in these compounds is a consequence of pair breaking effects due to moment formation on Mn.
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