Magnetic moment distribution in Ni-Pt alloys

We have measured the magnetic diffuse scattering of polarized and unpolarized neutrons from ferromagnetic Ni-Pt alloys with 20-, 30-, 40-, 50-, 55-, and 57- at .% Pt to determine the distribution of magnetic moments. We find that the average Ni and Pt moments decrease slowly out to about 50- at .% Pt and beyond that decrease rapidly toward zero at the critical concentration of 58- at .% Pt. The moment disturbance functions show peaks in the forward direction corresponding to moment disturbance effects that become increasingly longer ranged with increasing Pt content implying inhomogeneous moment distributions.