Abstract
Abstract We have carried out electrical resistivity ρ and AC-susceptibility χ AC measurements on YbInCu 4 under pressure. For pressures above 2.49 GPa, the first-order valence transition is completely suppressed and a clear peak appears in χ AC with a small kink in ρ at T M =2.4 K. The χ AC peak is easily diminished by applying low magnetic fields and disappears above ∼500 Oe. The characteristic behavior of χ AC at T M can generally be ascribed to the onset of long-range ferromagnetic ordering and, therefore, the ground state of the pressure-stabilized phase of YbInCu 4 is most probably a ferromagnetically ordered state.
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