Experimental study of physical properties in the complex magnetic phase diagram of Ce(Rh1-xRux)(3)B-2

Abstract

We report on a series of structural, magnetic, and thermodynamic measurements, a study of transport properties and x-ray absorption edge spectroscopy on Ce(Rh1−xRux)3B2. These investigations evidence that in addition to the already established ferromagnetic range for x<~0.06, a complex antiferromagnetic structure exists for concentrations 0.1<~x<~0.35. The behavior in the latter regime is dominated by an extraordinary strong intersite coupling; however, the magnetic moments involved appear to be very small. At the phase boundary to the paramagnetic regime (x≈0.4), significant deviations from a Fermi-liquid behavior occur.