Influence of Pressure on Superconductivity in YB_{6}

In uence of Pressure on Superconductivity in YB6 S. Gabania,∗, G. Prista2, I. Taka£ova, K. Flachbart, E. Gaoo, T. Mori, D. Braithwaite, P. Samuely Centre of Low Temp. Physics, Institute of Experimental Physics SAS, Watsonova 47, 040 01 Ko2ice, Slovakia National Institute for Materials Science, Namiki 1-1, 305 0044 Tsukuba, Japan SPSMS, UMR-E CEA / UJF Grenoble 1, INAC, 38054 Grenoble, France Magnetoresistivity measurements on a superconducting system of YB6 (Tc ≈ 7.5 K) down to 60 mK at hydrostatic pressures up to 47 kbar are presented. The superconducting transition temperature, as well as the third critical eld Hc3 reveal a linear decrease with increasing pressure with slopes of d lnHc3/dp = −1.1 %/kbar, and d lnTc/dp = −0.59 %/kbar. From the latter a critical pressure, pc ≈ 170 kbar, at which Tc vanishes, is determined.