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The crystal structure and magnetic properties of NiFeMnGaxSn1-x (x = 0, 0.25, 0.50, 0.75 and 1.00) Heusler compounds have been investigated experimentally and theoretically. The computational results suggest that NiFeMnGa0.75Sn0.25 is nearly half-metallic with a spin polarization P of 87%. The bulk samples prepared using arc-melting and annealing exhibit a high degree of Y-type order. All the investigated samples show ferromagnetic spin order with the Curie temperatures ranging from 284 K for NiFeMnGa to 408 K for NiFeMnSn. The intermediate composition NiFeMnGa0.75Sn0.25, which is predicted to be nearly half metallic, has a saturation magnetization of 66.50 emu/g and Curie temperature of 326 K. These results indicate that the NiFeMnGa0.75Sn0.25 alloy has potential for spin-transport-based devices.
Department of Physics
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UNI ScholarWorks, University of Northern Iowa, Rod Library
@2019 Waybright, et al.
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Waybright, Jace; Halbritter, Lee; Dahal, Bishnu; Qian, Hanyang; Huh, Yung; Lukashev, Pavel; and Kharel, Parashu, "Structure and magnetism of NiFeMnGaxSn1-x (x=0, 0.25, 0.5, 0.75, 1.00) Heusler compounds" (2019). Faculty Publications. 26.