Hyperfine field distributions in disordered Mn2CoSn and Mn2NiSn Heusler alloys

[摘要] Heusler alloys, Mn₂CoSn and Mn₂NiSn, were prepared and characterized by X-ray studies. Mössbauer studies using Sn-119 were carried out to investigate the hyperfine fields present at the Sn site in these alloys. The hyperfine field distribution in these alloys as well as X-ray studies point to the chemical disorder present in both alloys. Co-existence of a paramagnetic portion along with the magnetic hyperfine part was observed in Mn₂CoSn even at low temperatures, while this was not found in Mn2NiSn spectra. Hyperfine fields at Sn site were calculated using Blandin and Campbell model and compared with the experimental results.

[学科分类] 材料工程

[关键词] Hyperfine field distribution;Heusler alloys;Sn-119 Mössbauer spectroscopy.