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arXiv · 0910.5198

Suppression of the critical temperature of superconducting NdFeAs(OF) single crystals by Kondo-like defect sites induced by alpha-particle irradiation

C. Tarantini·M. Putti·A. Gurevich·Y. Shen·R. K. Singh·J. M. Rowell·N. Newman·D. C. Larbalestier·Peng Cheng·Ying Jia·Hai-Hu Wen
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Abstract

We report a comprehensive investigation of the suppression of the critical temperature Tc of NdFeAs(OF) single crystal by alpha-particle irradiation. Our data indicate that irradiation defects produce both nonmagnetic and magnetic scattering, resulting in the Kondo-like excess resistance $Δρ(T)\propto ln T$ over 2 decades in temperatures above $T_c$. Despite high densities of irradiation defects, the dose at which $T_c$ is suppressed to zero is comparable to that for MgB2 but is well above the corresponding values for cuprates.

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C. Tarantini, M. Putti, A. Gurevich, Y. Shen, R. K. Singh, J. M. Rowell, N. Newman, D. C. Larbalestier, Peng Cheng, Ying Jia, Hai-Hu Wen. 2009-10-27. Suppression of the critical temperature of superconducting NdFeAs(OF) single crystals by Kondo-like defect sites induced by alpha-particle irradiation. https://doi.org/10.1103/physrevlett.104.087002

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