2007/03/27 by M. Nicklas, O. Stockert, Tuson Park +8 · 2 citations
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Magnetic Properties of Alloys #Rare-earth and actinide compounds #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.76.052401
published as Phys. Rev. B 76, 052401 (2007) · 4 pages, 4 figures
arxiv created 2007/03/27 · openalex publication_date 2007/08/06 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The heavy-fermion superconductor CeCoIn5 is believed to be close to a magnetic instability, but no static magnetic order has been found. Cadmium doping on the In site shifts the balance between superconductivity and antiferromagnetism to the latter with an extended concentration range where both types of order coexist at low temperatures. We investigated the magnetic structure of nominally 10% Cd-doped CeCoIn5, being antiferromagnetically ordered below TN\ensuremath≈3\phantom\rule0.3em0exK and superconducting below Tc\ensuremath≈1.3\phantom\rule0.3em0exK, by elastic neutron scattering. Magnetic intensity was observed only at the ordering wave vector QAF=((1)/(2),(1)/(2),(1)/(2)) commensurate with the crystal lattice. Upon entering the superconducting state, the magnetic intensity seems to change only little. The commensurate magnetic ordering in CeCo(In_1\ensuremath-xCdx)5 is in contrast to the incommensurate antiferromagnetic ordering observed in the closely related compound CeRhIn5. Our results give insights into the interplay between superconductivity and magnetism in the family of CeTIn5 (T=Co, Rh, and Ir) based compounds.