  This work reports studies performed in the superconducting compound
FeSe0:5Te0:5 under high pressure. Changes were observed in the transition
temperature, superconducting critical fields,anomalous variations in the
Meissner fraction, and in Ginzburg Landau parameters. The superconducting
properties were calculated and compared using the Werthamer-Helfand-Hohenber
approximation and Ginzburg-Landau theory. Hydrostatic pressure was produced
from atmospheric to 823 MPa, the increment in the critical temperature was from
14.45 to 20.5 K at a rate of change about 0.0069 K/MPa.

Superconductivity