Pressure and the quadratic temperature term in the electrical resistance of NbTi

We have measured the electrical resistance of an Nb0.53Ti0.47 alloy sample as a function of temperature T (4–300 K) and pressure (<20 GPa). At low temperatures, above the superconducting transition, we observe a T 2 term whose coefficient decreases with pressure. It is linearly dependent on the residual resistance, that also decreases with pressure, in strong agreement with a Koshino–Taylor origin, i.e. inelastic carrier scattering against impurities.