SHEAR VISCOSITY OF SUPERFLUID HE-3 UP TO 15 TESLA

We present the first measurements of the viscosity of superfluid He-3 in magnetic fields up to 15 T, at temperatures down to 2 mK along the melting curve, using an assumption for the temperature dependence of t he normal density. At fields higher than 4 T, the viscosity shows a mi nimum in the A(1) phase, and reaches a local maximum at the A(2) trans ition which becomes global at 14.6 T. The sharp decrease just below th e A(1) transition can be understood within the Ginzburg-Landau framewo rk and is consistent with both theory and experiments in lower fields. At temperatures below the minimum, the viscosity in the A(1) phase is dominated by a term with T-2 dependence. Additionally, we have calcul ated the temperature dependence of the viscosity tensor in the low tem perature Limit using the method of temperature asymptotes.