Change of Antiferromagnetic Structure near a Quantum Critical Point in CeRh1-xCoxIn5

Abstract

The elastic neutron scattering experiments were carried out on the solid solutions CeRh_{1-x}Co_xIn_5 to clarify the nature of the antiferromagnetic (AF) state in the vicinity of the quantum critical point (QCP): x_c ~0.8. The incommensurate AF order with the wave vector of q_h=(1/2,1/2,~0.3) observed in pure CeRhIn_5 is weakly suppressed upon doping with Co, and a commensurate q_c=(1/2,1/2,1/2) and an incommensurate q_1=(1/2,1/2,~0.42) AF structures evolve at intermediate Co concentrations. These AF orders are enhanced at x=0.7, and furthermore the q_h AF order vanishes. These results suggest that the AF correlations with the q_c and q_1 modulations are significantly enhanced in the intermediate x range, and may be connected with the evolution of the superconductivity observed above x~0.3.

5 pages, 5 figures, accepted for publication in Phys. Rev. B

References in corpus (6)

• Spin resonance in the d-wave superconductor CeCoIn5
• Reversible Tuning of the Heavy Fermion Ground State in CeCoIn${}_5$
• Magnetic structure of Cd-doped CeCoIn5
• Competition between unconventional superconductivity and incommensurate antiferromagnetic order in CeRh1-xCoxIn5
• New Magnetic State in Incommensurate Magnetic Phase of Heavy-Fermion Superconductor CeRh0.6Co0.4In5
• Polarized neutron scattering study on antiferromagnetic states in CeRh0.6Co0.4In5

Cited by in corpus (6)

• Nature of the spin resonance mode in CeCoIn${}_5$
• Switching of the magnetic order in CeRhIn${}_{5-x}$Sn${}_x$ in the vicinity of its quantum critical point
• Observation of a new field-induced phase transition and its concomitant quantum critical fluctuations in CeCo(In${}_{1-x}$Zn${}_x$)${}_5$
• Superconductivity and non-Fermi-liquid behavior in the heavy-fermion compound CeCo${}_{1-x}$Ni${}_x$In${}_5$
• Anisotropic magnetic-field response of quantum critical fluctuations in Ni-doped CeCoIn5
• Magnetic structure of Cd-doped CeIrIn${}_5$