  (MnNiSi)1-(Fe2Ge)x composition (x=0.34) alloy was prepared by arc melting,
crushed, and sieved to approximately <32 microns. They were utilized in
examining the possible magnetic and structural changes when exposed to a dosage
of a continuous sweeping rate of ~>120 Gy/min and an absorbed dose of 35 kGy of
X-ray radiation. This study reports observable trends in X-ray diffraction and
magnetic measurements. Magnetization in the magnetization vs. temperature (both
heating and cooling) measurements showed an increase from 2.72 emu/g to 4.01
emu/g in the irradiated sample. The Magnetization vs. magnetic field loops
exhibited irradiation-induced magnetic hysteresis. The irradiated sample also
exhibited an observable change in its coercivity of {\Delta}Hc = 14.7% at 200
K. A maximum entropy change {\Delta}Smag of ~ 11.139 J/kg*K and a Tave peak of
317.5 K was achieved for the pristine sample in comparison to {\Delta}Smag of ~
11.349 J/kg*K and a Tave peak of 312.5 K for the irradiated sample. These
presented results provided deeper insights into tuning the effect of
irradiation to the magnetic properties of (MnNiSi)1-(Fe2Ge)x for composition
(x=0.34) that can be utilized in a wide range of magnetocaloric applications in
high-energy radiation environments. The irradiation applied to the sample did
not induce any structural or magnetic phase changes in the selected composition
but modified the magnetic properties marginally.
