2002/09/25 by A. Karkin, A. E. Kar'kin, B. Goshchitskii +10
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Superconductivity (cond-mat.supr-con) #Superconductivity in MgB2 and Alloys #Thermal Expansion and Ionic Conductivity #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/0209575
4 pages, latex, 4 figures
arxiv created 2002/09/25 · openalex publication_date 2002/09/25 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The effect of radiation-induced disordering in a nuclear reactor (fast neutrons fluence Φ= 5⋅1019 cm2, Tirr = 340 K) on resistivity ρ, superconducting transition temperature TC and upper critical field HC2 of polycrystalline MgCNi3 samples was investigated. It was found that TC decreases under irradiation from 6.5 to 2.9 K and completely recovers after annealing at 600 ^\circC. Temperature dependences ρ(T) are characteristic of compounds with strong electron-phonon interaction. The dHC2/dT behaviour testifies to a considerable decrease in density of electronic state at Fermi level N(EF) in the course of disordering.