Magnetic Anisotropy in the Systems Samarium 2 (Cobalt, Iron) 17 and Samarium 2 Manganese (Cobalt, Iron) 16.
Research and development technical rept.,
ARMY ELECTRONICS RESEARCH AND DEVELOPMENT COMMAND FORT MONMOUTH NJ ELECTRONICS TECHNOLOGY/DEVICES LAB
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The anisotropy fields and saturation magnetizations of the samarium-cobalt-iron and samarium-manganese-cobalt-iron 2-17 systems were measured at 4.2 K and 300 K in applied fields up to 100 kOe. The presence of the Mn in the latter system raised the anisotropy fields by as much as 55 percent over those measured for the corresponding compounds in the ternary system. The augmentation of anisotropy was accompanied by a slight decline in the saturation magnetization of approximately 5 percent for the materials with the highest anisotropy fields. The values of the saturation magnetization for the quaternary compounds showed much better temperature stability, increasing by about 5 percent in going from 300 K to 4.2 K as compared to 15 percent for the ternary system. A comparison of the present results with previous anisotropy measurements obtained by extrapolation from applied fields up to 20 kOe showed the latter to be too low by as much as 35 percent. Author
- Metallurgy and Metallography
- Electricity and Magnetism