  We measure the ac susceptibility of single-crystal CeCoIn5 in dc field
parallel to the c axis and find further evidence for a high-field phase
transition within the superconducting phase in this orientation. We apply up to
2.3 kbar uniaxial pressure along the c axis and discuss the pressure dependence
of the high-field phase. We also report the behavior of Hc2 under uniaxial
pressure for field along c.
