2008/05/14 by M. Yokoyama, N. Oyama, H. Amitsuka +11
Chemistry · Materials Science · Physics and Astronomy · #Inorganic Chemistry and Materials #Iron-based superconductors research #Rare-earth and actinide compounds #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.77.224501
published as Phys. Rev. B 77, 224501 (2008) · 5 pages, 5 figures, accepted for publication in Phys. Rev. B
arxiv created 2008/05/14 · openalex publication_date 2008/06/03 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The elastic neutron-scattering experiments were carried out on the solid solutions CeRh_1\ensuremath-xCoxIn5 to clarify the nature of the antiferromagnetic (AF) state in the vicinity of the quantum critical point: xc\ensuremath∼0.8. The incommensurate AF order with the wave vector of qh=(1/2,1/2,\ensuremath∼0.3) observed in pure CeRhIn5 is weakly suppressed upon doping with Co, and a commensurate qc=(1/2,1/2,1/2) and an incommensurate q1=(1/2,1/2,\ensuremath∼0.42) AF structures evolve at intermediate Co concentrations. The AF orders with qc and q1 are enhanced at x=0.7, and furthermore, the qh AF order vanishes. These results suggest that the AF correlations with the qc and q1 modulations are significantly enhanced in the intermediate x range, and may be connected with the evolution of the superconductivity observed above x\ensuremath∼0.3.