  We report the structure, magnetic property and spin polarization of CoFeMnGe
equiatomic quaternary Heusler alloy. The alloy was found to exist in the L21
structure with considerable amount of DO3 disorder. Thermal analysis result
indicated the Curie temperature is about 711K without any other phase
transformation up to melting temperature. The magnetization value was close to
that predicted by the Slater-Pauling curve. Current spin polarization of P =
0.70 {plus/minus}0.1 was deduced using point contact Andreev reflection (PCAR)
measurements. Half-metallic trend in the resistivity has also been observed in
the temperature range of 5 K to 300 K. Considering the high spin polarization
and Curie temperature, this material appears to be promising for spintronic
applications.
