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FIZIKA A 7 (1998) 2, 81-90
THE EFFECT OF g-RAY IRRADIATION ON MAGNETIC PROPERTIES OF ELECTROMAGNETIC Fe-Si (97%-3%) SHEETSWAFIK HARARA Atomic Energy Commission, P.O.Box 6091, Damascus, Syria Received 19 February 1998; accepted 6 July 1998.The effect of g-ray irradiation on magnetic properties of electromagnetic steel sheets has been investigated. The measurements were carried out by using transformer Fe-Si (97%-3%) sheets. The energy losses and dependence of the relative permeability as well as of the differential permeability on strength of the magnetizing field before and after irradiation were measured. The measurements show that, after irradiation, the energy losses in the electromagnetic sheets for a maximum field of 1.0 Tesla at the frequency of 50 Hz decreased to less than 10% of energy losses before irradiation. The value of the saturation magnetic field after irradiation also decreased by about 10%. The relative permeabitity values in the region of rotation of magnetization domains after irradiation decreased on the average by 5%, whereas the value of their differential permeability around each working point remained unchanged. PACS numbers: 75.50.Bb, 75.90.+w, 81.40.-z
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Copyright by The Croatian Physical Society
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