EFFECTS OF RADIATION ON FERROELECTRIC AND FERRIMAGNETIC MATERIALS. PART II. FERRIMAGNETIC MATERIALS
Abstract
The effects of reactor radiations on the magnetic properties of 16 polycrystalline ferrites and magnetic garnets were studied. The materials were Ferramic E, I, O-3, S-1, S-3, R-1, R-4, R-5, R-6, and T-1, Ferroxcube 3-C, General Electric 36H, 36L, and 42L, and Yerramic R-1, S-1, and S-3 and Sm-Fe garnet. The effects of radiation on the hysteresis properties were insignificant after exposures below 10 to the 18th power n/sq cm. At 10 to the 18th power n/sq cm, increases in coercive force and rem- and Sm-Fe garnets. Hysteresis loops (0.4 to 100 kc) were measured in the Ferramic materials (except R-4, R-5, and R-6), Ferroxcube 3-C and the garnets. In addition, complex permeability (300 to 600 kc) was measured in Ferramic R-1, S-1, and S-3 and Sm-Fe garnet. The effects of radiation on the hysteresis properties were insignificant after exposures below 10 to the 18th power n/sq cm. At 10 to the 18th power n/sq cm, increases in coercive force and rem- and Sm-Fe garnets. Hysteresis loops (0.4 to 100 kc) were measured in the Ferramic materials (except R-4, R-5, and R-6), Ferroxcube 3-C and the garnets. In addition, complex permeability (300 to 600 kc) was measured in Ferramic R-1, S-1, and S-3 and Sm-Fe garnet. The effects of radiation on the hysteresis properties were insignificant after exposures below 10 to the 18th power n/sq cm. At 10 to the 18th power n/sq cm, increases in coercive force and remanence were observed. The largest change observed was about 30%. The shapes of the hysteresis loops were not drastically affected. Also, post-irradiation aging and heat treatment were relatively ineffective in annealing the radiation damage. (A thor)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 15, 1961
- Accession Number
- AD0264449
Entities
People
- J.s. Mills
- S.i. Taimuty
Organizations
- SRI International