High-field X-ray diffraction and high-pressure magnetization measurements of the pseudobinary compound Ce(Fe0.9Co0.1)2

The magnetic and structural properties of Ce(Fe0.9Co0.1)2 with the C15 cubic Laves-phase structure have been studied by magnetization measurement in high magnetic fields under high pressures, and powder X-ray diffraction measurement in fields up to 5T. The C15 cubic structure is distorted to rhombohedral symmetry accompanied with the magnetic phase transition from the ferromagnetic to the antiferromagnetic state, which recovered the C15 structure by applying the magnetic field. The antiferromagnetic phase is induced by the lattice contraction due to hydrostatic pressure. Obtained results suggest that the AFM correlation due to the Ce 4f–Fe 3d hybridization plays an important role on the structural and magnetic properties.