Nanodispersed lead in metallic and amorphous matrices was synthesized by rapid solidification processing. The optimum microstructure was tailored to avoid percolation of the particles. With these embedded particles it is possible to study quantitatively the effect of size on the superconducting transition temperature by carrying out quantitative microstructural characterization and magnetic measurements. Our results suggest the role of the matrices in enhancement or depression of superconducting transition temperature of lead. The origin of this difference in behavior with respect to different matrices and sizes is discussed.
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Chattopadhyay, K., Bhattacharya, V. & Tsai, A.P. Superconductivity of embedded lead nano particles in metallic and amorphous matrices. MRS Online Proceedings Library 703, 1322 (2001). https://doi.org/10.1557/PROC-703-V13.22