2001/03/16 by A. E. Kar'kin, A. E. Karkin, Karkin, A. E. +18
Materials Science · Physics and Astronomy · #Boron and Carbon Nanomaterials Research #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con) #Superconductivity in MgB2 and Alloys #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/0103344
3 pages, 5 figures
openalex publication_date 2001/03/16 · arxiv created 2001/03/17 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The electrical resistivity ρ and upper critical field Hc2 were measured in MgB2 disordered by nuclear reactor neutrons. We found that superconducting temperature Tc decreases under irradiation from 40 to 5 K. Despite strong disordering (more than 10 dpa (displacements per atom)), the initial crystal structure is preserved. The residual resistivity ρ0 increases from 0.35 to 2 mΩ cm while -dHc2/dT remains approximately unchanged (-dHc2/dT ≈ 0.5 T/K), and such behavior may be interpreted as decrease in the density of electronic states.