Intermetallic ferromagnetic compound Mn5 Ge3, with Curie temperature TC =296 K, a spin polarization of P=42%, and a good lattice match to semiconductors, is a potential spin injector for spintronics. We report the enhanced magnetic properties and spin polarization of Mn4 Fe Ge3. By replacing one Mn atom in Mn5 Ge3 with Fe, the TC of Mn4 Fe Ge3 has been enhanced to 319.50 K, while still maintaining the same crystal structure, high electrical conductivity, and a high residual resistivity ratio of 5.33. More importantly, the spin polarization in excess of 60% of Mn4 Fe Ge3, much higher than that of Mn5 Ge3, has been realized.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)