Thin films of a ternary Ni‐Fe‐P alloy suitable for use in computer memories have been electrodeposited from a sulfate bath containing sodium hypophosphite. Glass coated with conductive vacuum evaporated layers of chromium and gold was used as a substrate. Essentially nonmagnetostrictive films, 1200Aå thick and 3 × 3 in. in area, with coercivities of 2 oe and anisotropy fields of 3.5 oe were prepared reproducibly. The effects of hypophosphite ion in the plating solution on the deposit composition, cathode potentials, and magnetic properties of the films are discussed.
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Freitag et al. (1964) studied this question.