Neutron Diffraction Experiment on γ-Cu₁₅Mn₈₅ Single Crystal

Abstract

For an antiferromagnetic Cu₁₅Mn₈₅ single crystal, strong diffuse scattering with 0.28a^* FWHM was observed around the {1/2 1 0} reciprocal lattice points at room temperature. The study on their scattering vector dependence as well as their temperature variation revealed that the atomic short range correlation of D0₂₂ type gives large contributions to diffuse scattering and that the magnetic contribution is small even if it exists.