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Suppression of Superconductivity in Single Crystals of UPt_3 by Pd Substitution

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arxiv cond-mat/9903075 v1 pith:6LLCUV5H submitted 1999-03-04 cond-mat.supr-con cond-mat.str-el

M. J. Graf , R. J. Keizer , A. de Visser , A. A. Menovsky , J. J. M. Franse This is my paper · ORCID
classification cond-mat.supr-concond-mat.str-el
keywords substitutionsuppressioncrystalsimpurityscatteringsinglesuperconductivitybeen
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The suppression of superconductivity by substitution effects has been measured in high quality single crystals of U(Pt_{1-x} Pd_x)_3 with 0 <= x <= 0.002. While the superconducting transition temperature T_c varies linearly with residual resistivity r_0, consistent with pair-breaking by impurity potential scattering, the rate of suppression of T_c with r_0 is much larger for Pd substitution than for other impurity substitutions or by increased defect density. This effect is correlated with an increase in the inelastic scattering coefficient, and may be related to Pd-induced changes in the magnetic fluctuation spectrum.

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