Abstract
We report on experimental evidence for a coupling between the magnetic-field-induced fluctuations of correlated Ce ions coinciding with the discontinuous movement of the underlying spin-density wave in the intermetallic rare-earth compound CeAg${}_{2}$Ge${}_{2}$. The measurements performed using neutron scattering and magnetic Gruneisen ratio methods suggest that the coupling is onset at $H=2.7$ T and $T\ensuremath{\le}3.8$ K and persists to the lowest measurement temperature of $\ensuremath{\simeq}$0.05 K. These measurements suggest that the spin fluctuations can affect the intrinsic properties of the system.
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