2005/06/29 by I. Pallecchi, C. Tarantini, H. U. Aebersold +14 · 1 citation
Materials Science · Physics and Astronomy · #Hydrogen Storage and Materials #Magnetic Properties of Alloys #Superconductivity in MgB2 and Alloys #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.71.212507
published as Phys. Rev. B 71,1 (2005) · 13 pages, 3 igures
arxiv created 2005/06/29 · openalex publication_date 2005/06/29 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study the effect of neutron irradiation on the critical current density Jc of isotopically pure polycrystalline Mg\phantom\rule0.2em0ex11B2 samples. For fluences in the range 1017--1018\phantom\rule0.3em0excm^\ensuremath-2, Jc is enhanced and its dependence on magnetic field is significantly improved: we demonstrate that, in this regime, pointlike pinning centers are effectively introduced in the system proportionally to the neutron fluence. Instead, for larger fluences, a strong suppression of the critical temperature accompanied by a decrease of both the upper critical field Bc2 and Jc is found.