Abstract
We report dc-magnetization measurements on at temperatures down to 0.04 K, magnetic fields , and under hydrostatic pressure . At ambient pressure a kink at indicates a new type of field-induced transition from an itinerant to a localized state. This transition is different from the metamagnetic transition observed in other heavy-fermion compounds, as here ferromagnetic rather than antiferromagnetic correlations dominate below . Hydrostatic pressure experiments reveal a clear correspondence of to the characteristic spin fluctuation temperature determined from specific heat.
- Received 7 December 2004
DOI:https://doi.org/10.1103/PhysRevLett.94.226402
©2005 American Physical Society