Electronic and magnetic properties of CoFeV<sub>0.5</sub>Mn<sub>0.5</sub>Si: experiment and theory

POSTER

Abstract

Half-metallic Heusler alloys have been investigated as potential materials for spin-transport-based devices. We have synthesized one such material, CoFeV0.5Mn0.5Si, using arc melting and high-vacuum annealing at 600oC for 24 hours. First principles calculation indicates that CoFeV0.5Mn0.5Si is nearly half-metallic with the degree of spin polarization of about 93%. The annealed sample exhibits cubic crystal structure without disorder and secondary phases. It shows  ferromagnetic order at room temperature with  the Curie temperature of  657 K and saturation magnetization of 92 emu/g (3.06 μB/f.u). The observed structural and magnetic properties are consistent with the theoretical results. Our results indicate that CoFeV0.5Mn0.5Si has a potential for room temperature spin-transport-based devices.

*This research is supported by the National Science Foundation (NSF) under Grant Numbers 2003828 and 2003856 via DMR and EPSCoR.

Presenters

  • Parashu R Kharel

    • South Dakota State University

Authors

  • Parashu R Kharel

    • South Dakota State University

  • Gavin Baker

    • South Dakota State University

  • Matthew Flesche

    • South Dakota State University

  • Adam Ramker

    • University of Northern Iowa

  • Young Moua

    • University of Northern Iowa

  • Shah Valloppilly

    • University of Nebraska-Lincoln
    • University of Nebraska

  • Paul Shand

    • University of Northern Iowa

  • Pavel Lukashev

    • University of Northern Iowa