Magnetic Properties of Ion Irradiated Fe_{75}Mo_{8}Cu_{1}B_{16} Metallic Glass

Microstructure and thermomagnetic properties of ion-bombarded amorphous Fe75Mo8Cu1B16 alloy are investigated.The Mössbauer spectroscopy shows that surface regions at the air side of the ribbons irradiated with 2×10 16 ions/cm 2 were significantly affected by 130 keV N + ions.On the other hand, the opposite (wheel) side that was not exposed to ion irradiation is practically intact.The analysis of temperature dependences of magnetization shows the Curie points of 313 K and 316 K for as-quenched and irradiated samples, respectively.The maximum of magnetic entropy change calculated for the irradiated alloy in a magnetic field of 1.0 T occurs at 312.5 K and equals to 0.77 J kg -1 K -1 while that of the as-quenched sample is 0.74 J kg -1 K -1 .