2006/10/03 by M. Yokoyama, H. Amitsuka, Hiroshi Amitsuka +10 · 3 citations
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Magnetic Properties of Alloys #Rare-earth and actinide compounds #cond-mat.str-el
paper · pdf · doi:10.1143/jpsj.75.103703
published as J. Phys. Soc. Jpn. 75, 103703 (2006) · 5 pages, 4 figures, to appear in J. Phys. Soc. Jpn
arxiv created 2006/10/03 · openalex publication_date 2006/10/10 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We performed elastic neutron scattering experiments on solid solution CeRh1-xCoxIn5 with x=0.4 to clarify the nature of the antiferromagnetic (AF) phase in the vicinity of the quantum critical point. We observed the incommensurate AF order below TNh=3.5 K. The structure of the incommensurate AF order is basically unchanged from that for pure CeRhIn5. We further found the evolution of a new commensurate AF order with the modulation of qc=(1/2,1/2,1/2) below TNc=2.9 K. The volume-averaged moments for the incommensurate and commensurate AF phases are 0.38 muB/Ce and 0.21 muB/Ce, respectively, which are reduced from the incommensurate AF moment (0.75 muB/Ce) for pure CeRhIn5. We suggest from these results that the commensurate magnetic correlation may be tightly coupled with the superconductivity observed below Tc=1.4 K.