Localized Moment in Ni_0.95Cr_0.05 Alloy

Abstract

Magnetic from factor of Ni–Cr alloy with 4.5 at % Cr was measured by the polarized neutron diffraction method. From the form factor analysis, the mean localized moments of Ni and Cr were determined as 0.356±0.002 μ_B and 0.002±0.91 μ_B at room temperature respectively. The rate of decrease of the mean localized moment of Ni at 0 K with respect to the Cr concentration ∂μ_Ni⁄∂c=−5.8±0.2μ_B is slightly steeper than that of the bulk moment. From this and from disturbance parameters of Cr in the Co_0.95Cr_0.05 alloy, the magnetic clusters around each environment dependent moment of Ni atoms in the Ni_0.95Cr_0.05 alloy were calculated.