Magnetoresistance and field-induced structural transitions in Ni50Mn50-xSnx Heusler alloys
Large magnetoresistance effects were observed in Ni50Mn50-xSnx Heusler alloys for concentrations 13≤x≤16. The effects occur at the respective martensitic transition temperatures (TM), which can be tuned in temperature through variations in Sn concentration. The largest observed values of the magnetoresistance (Δρ/ρo) were -42% for x=14 at T≈250 K, and -23% above room temperature (T≈320 K) for the sample with x=13, where the magnetic field change was ΔH=5 T. Magnetization and X-ray diffraction measurements indicate that the origin of the observed magnetoresistance is a magnetically induced magnetostructural transition from a complex 10 M modulated orthorhombic phase containing some antiferromagnetic coupling to a ferromagnetic cubic L21 structure. © 2007 Elsevier B.V. All rights reserved.
Publication Source (Journal or Book title)
Journal of Magnetism and Magnetic Materials
Khan, M., Pathak, A., Paudel, M., Dubenko, I., Stadler, S., & Ali, N. (2008). Magnetoresistance and field-induced structural transitions in Ni50Mn50-xSnx Heusler alloys. Journal of Magnetism and Magnetic Materials, 320 (3-4) https://doi.org/10.1016/j.jmmm.2007.06.016