The suppression of superconductivity in Mn substituted MgCNi$_{3}$
arXiv:cond-mat/0306052 · doi:10.1103/PhysRevB.68.064503
Abstract
We report the effect of doping Mn in the isostructural MgCNi$_{3-x}$Mn$_{x}$ (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$\neq$0. The rapid suppression of superconductivity ($\sim$ -21K/at.% Mn) in these compounds is a consequence of pair breaking effects due to moment formation on Mn.
9 figures, Accepted for publication in Physical Review B, Added references