2001/04/03 by M. R. Eskildsen, A. B. Abrahamsen, Asger Bech Abrahamsen +6 · 3 citations
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Rare-earth and actinide compounds #Superconductivity in MgB2 and Alloys #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.86.5148
published as Phys. Rev. Lett. 86, 5148 (2001) · 4 pages, 3 figures
arxiv created 2001/04/03 · openalex publication_date 2001/05/28 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We have investigated the temperature dependence of the H\ensuremath∥c flux line lattice structural phase transition from square to hexagonal symmetry, in the tetragonal superconductor LuNi2B2C ( Tc\phantom\rule0ex0ex=\phantom\rule0ex0ex16.6K). At temperatures below 10 K the transition onset field, H2(T), is only weakly temperature dependent. Above 10 K, H2(T) rises sharply, bending away from the upper critical field. This contradicts theoretical predictions of H2(T) merging with the upper critical field and suggests that just below the Hc2(T) curve the flux line lattice might be hexagonal.