Preparation and Magnetic Properties of Electrodeposited Permalloy Films

Saccharin was added during preparation of Permalloy sample by electrodeposition in an attempt to reduce mechanical strain and improve the magnetic properties. For a constant film thickness T, the internal stress tended to decrease as saccharin was added to the plating bath. Dependences of coercive force Hc and squareness ratio Br/Bm on T and the amount of saccharin added were also found. The minimum Hc was obtained for a film thickness of 2 ¿m, regardless of whether saccharin was added; the addition of saccharin also had little effect on the squareness ratio.