Abstract
In order to compare the radiation resistance of amorphous and crystalline magnetic alloys, samples of commercial high-permeability alloys were irradiated with high-energy neutrons near the beam stop of LAMPF. Both crystalline and amorphous alloys showed a decrease of permeability with increasing fluence. Samples prepared from Permalloy (crystalline) and the amorphous alloys Metglas 2605S-3 and 2705M were tested. The permeability of the Metglas 2605S-3 sample showed the slowest rate of decrease, being at least a factor of ten slower than for the Permalloy. The permeability decrease as a function of fluence for Metglas 2605S-3 appears to occur in two stages. It is proposed that the first stage is due to directional short-range ordering that occurs at an enhanced rate due to the excess point defects produced by the irradiation. The second stage is thought to be caused by pinning of domain walls by defect clusters produced by the collision cascade.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
