Change of antiferromagnetic structure near a quantum critical point in CeRh1-x Cox In5

M. Yokoyama, N. Oyama, H. Amitsuka, S. Oinuma, I. Kawasaki, K. Tenya, M. Matsuura, K. Hirota, T. J. Sato

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16 Citations (Scopus)

Abstract

The elastic neutron-scattering experiments were carried out on the solid solutions CeRh1-x Cox In5 to clarify the nature of the antiferromagnetic (AF) state in the vicinity of the quantum critical point: xc ∼0.8. The incommensurate AF order with the wave vector of qh = (1/2,1/2,∼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,∼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∼0.3.

Original languageEnglish
Article number224501
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume77
Issue number22
DOIs
Publication statusPublished - 2008 Jun 3
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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