Pressure dependence of the spin dynamics around a quantum critical point : An inelastic neutron scattering study of Ce0.87La0.13Ru2Si2

Abstract

Inelastic neutron scattering experiments performed on a single crystal of the antiferromagnetic compound Ce${}_{0.87}$La${}_{0.13}$Ru${}_2$Si${}_2$ under applied pressures of up to 5 kbar are reported. A quantum critical point is reached at around 2.6 kbar where long-range magnetic order disappears. The variation of the characteristic energy scales with respect to temperature and pressure is followed and found to saturate in the ordered phase.

14 pages (6 figures)

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