  Experimental and computational studies were performed on Co2FeGe Heusler
alloy. It was found that the alloy has very high experimental magnetic moment
of 6.1 muB/f.u., curie temperature of 1073K and very high spin-wave stiffness
constant of 10.4 nm2-meV, which indicates that the magnetic moment is very high
and do not vary with change in temperature in the range 0-300K. The alloy
strictly follows Slater-Pauling (SP) rule and the minor experimental deviation
from its SP value is justified by doing full-potential density functional
calculations which gives more accurate result when electron-electron
correlation parameter (U) is taken into account with conventional GGA method.
Effect of lattice strain and electron correlation on individual atomic moments,
total magnetic moment and spin-polarization is studied in detail and can be
concluded that they have a role in the deviation of the experimental results
from the expected theoretical values.
