Spin-resolved scattering in the Cu(Mn) magnetic-impurity system

Abstract

We report spin-resolved scattering measurements on the Cu(Mn) magnetic-impurity system using the third-harmonic de Haas---van Alphen wave-shape---analysis technique (dHvA WA). Magnetic field and temperature dependences of spin-up and spin-down scattering and the magnetic-moment---conduction-electron interaction ${H}_{\mathrm{ex}}$ are presented. The exchange field ${H}_{\mathrm{ex}}$ is found not to scale with $\frac{H}{T}$. The $H$ and $T$ dependences of the spin-resolved scattering agree qualitatively with existing theories and spin-averaged experimental data such as the negative magnetoresistivity. The spin-resolved $d$-impurity scattering phase shifts derived from our data agree with results obtained by other, complementary methods. Fundamental dHvA amplitude measurements are presented on all symmetry orbits. For the low-field data, a partial-wave shift analysis indicates predominately $d$-type impurity scattering. The high-field data deviate from a linear extrapolation of the low-field data on all orbits. The magnetic field where the deviation occurs scales with the amount of $d$ wave present in that orbit.