Pressure studies of reentrance behavior in H-c2 of HoNi2B2C

Abstract

We have investigated pressure dependence of the superconductivity of HoNi2B2C using high quality single crystals. Upon applying pressures, T, was slightly suppressed unlike T-N taken from M(T) data that increases gradually with pressures. At the same time, reentrance behavior found in H,2 gets subdued and disappears altogether above 8.3 kbar. Our experimental findings can be understood in terms of the Ginzburg-Landau type analysis.