Abstract
Structural and magnetic properties of plastic deformed Si-doped Ni3Mn alloy were studied by high resolution x-ray diffraction, powder neutron diffraction, and diffuse magnetic scattering measurements. Both deformed and undeformed specimens showed disordered face-centered cubic structure with slightly different lattice parameters of 3.5961 Å and 3.5890 Å. Magnetic properties, however, showed significant differences; Néel temperatures of 87.5 K and 62.5 K, respectively, paramagnetic Curie temperatures of −325 K and 125 K, and effective magnetic moments per metal atom of 3.51 μB and 0.41 μB, respectively. It is considered that distortion of crystals and, hence, change of local environment of magnetic atoms due to the plastic deformation cause different magnetic behaviors.
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