ACTA

Influence of Pressure on Superconductivity in YB₆

S. Gabáni^a, G. Pristáš^a, I. Takáčová^a, K. Flachbart^a, E. Gažo^a, T. Mori^b, D. Braithwaite^c, P. Samuely^a
^aCentre of Low Temp. Physics, Institute of Experimental Physics SAS, Watsonova 47, 040 01 Košice, Slovakia
^bNational Institute for Materials Science, Namiki 1-1, 305 0044 Tsukuba, Japan
^cSPSMS, UMR-E CEA / UJF Grenoble 1, INAC, 38054 Grenoble, France

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Magnetoresistivity measurements on a superconducting system of YB₆ (T_c ≈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 field H_c3 reveal a linear decrease with increasing pressure with slopes of dln H_c3/d p=-1.1 %/kbar, and d ln T_c/d p = -0.59 %/kbar. From the latter a critical pressure, p_c ≈ 170 kbar, at which T_c vanishes, is determined.

DOI: 10.12693/APhysPolA.126.340
PACS numbers: 74.70.Ad, 74.25.F-, 62.50.-p