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This work reports about the electronic, magnetic, and structural
properties of the binary compound Mn3Ga. The tetragonal DO22 phase of
Mn3Ga was successfully synthesized and investigated. It has been found
that the material is hard magnetic with an energy product of
H(c)xB(r)=52.5 kJ m(-3) and an average saturation magnetization of about
0.25 mu(B)/at. at 5 K. The saturation magnetization indicates a
ferrimagnetic order with partially compensating moments at the Mn atoms
on crystallographically different sites. The Curie temperature is above
730 K where the onset of decomposition is observed. The electronic
structure calculations indicate a nearly half-metallic ferrimagnetic
order with 88% spin polarization at the Fermi energy. (c) 2007 American
Institute of Physics.
