S. Lefebvre, et al., Phys. Rev. Lett. 85, 5420-5423 (2000). order
transitions dividing normal and SDW phases ending at a tricritical point.
However, the lineshapes indicate the domain wall width is not negligible
relative to the characteristic SDW domain size. On the high-pressure side
of the phase boundary, nuclear spin-lattice relaxation is used to identify
the crossover from non-Fermi Liquid behavior to Fermi Liquid (FL). The
first order line and the crossover to FL are both affected by the
introduction of disorder into the counterion sublattice.
(in collaboration with W. Yu, F. Zamborszky, P. Chaikin, and I.J. Lee)
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