Phase diagram of the heavy fermion systemYbFe2Ge2under pressure

J. Larrea J., M. B. Fontes, E. M. Baggio-Saitovitch, J. Plessel, M. M. Abd-Elmeguid, J. Ferstl, C. Geibel, A. Pereira, A. Jornada, M. A. Continentino
2006 Physical Review B  
The phase diagram of the heavy fermion compound YbFe 2 Ge 2 under high pressures P ഛ 18.2 GPa was obtained by electrical resistivity measurements. Pressure drives the system from a paramagnetic Fermi liquid state to a magnetically ordered state, with a quantum critical point at P C Ϸ 9.4 GPa. In the vicinity of P C a non-Fermi-liquid behavior ascribed to two-dimensional antiferromagnetic fluctuations is observed. In the magnetic side, the resistivity shows the existence of spin-wave excitations characteristic of an antiferromagnet.
doi:10.1103/physrevb.74.140406 fatcat:mhtr33qlvjbqjhtekfvxqxsikm