Strain Waves in Cr, CrMn and CrV Alloys

Abstract

The strain waves in pure Cr, CrMn and CrV alloys were studied by means of neutron diffraction. The strain wave amplitude, Δa⁄a, due to the spin density wave ordering is (1.1±0.1)×10⁻³ for pure Cr. This value is almost the same for CrMn alloys and is smaller for CrV alloys. The ratio of the modulated strain to the uniform lattice expansion, (Δa⁄a)⁄(ΔL⁄L)_mag, is about 3 for pure Cr and is smaller for CrMn alloys. These results can be explained either by the two band nesting model or by the virtual bound state approach, qualitatively.