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 the normal density. At fields higher than 4 T, the viscosity shows a minimum in the A(1) phase, and reaches a local maximum at the A(2) transition which becomes global at 14.6 T. The sharp decrease just below the A(1) transition can be understood within the Ginzburg-Landau framework 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 calculated the temperature dependence of the viscosity tensor in the low temperature Limit using the method of temperature asymptotes.