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

Abstract

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 2×1016 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 .

Radiation Effects in Amorphous Metallic Alloys as Revealed by Mössbauer Spectrometry: Part II. Ion Irradiation

“…Recently, Fe-based soft magnetic AMAs were suggested as candidates for magnetic cores of accelerator RF-cavities to improve their performance [1][2][3]. In this particular application, they are exposed to ion irradiation that might affect their microstructure and magnetic properties [4][5][6][7][8][9][10]. The ion-induced radiation damage is due to displacement of target atoms by elastic and/or inelastic collisions.…”