Effect of pressure on spin fluctuations and superconductivity in heavy-fermion UPt3
Abstract
We have determined the effect of hydrostatic pressure on the susceptibility, on the T2 temperature dependence of the spin-fluctuation resistivity, and on superconductivity in UPt3. The spin-fluctuation temperature Ts, derived from the slope of resistivity versus T2, is used within a Fermi-liquid picture to calculate the susceptibility at T=0 K. The depression of this calculated with pressure agrees with the directly measured value lnP=-24 Mbar-1. Both the superconducting transition temperature Tc and the initial slope of the upper critical field also decrease under pressure. We find that lnTc/P=-25 Mbar-1 and speculate upon correlations between and Tc. © 1985 The American Physical Society.
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