Preparation of Electrodeposited High-B_s and High-ρ CoNiFe Thin Films by Mo Addition

Abstract

Addition of a complexing agent and/or Na₂MoO₄ to the bath was investigated with a view to increasing the resistivity of CoNiFe soft magnetic thin films. Results showed that the electrical resistivity of CoNiFe thin films was increased by addition of a complexing agent such as sodium tartrate and sodium citrate. These films contained a small amount of carbon of 1 to 2 at%. The addition of Na₂MoO₄ also resulted in an increase in resistivity of CoNiFe thin films. This Co₅₉Ni₁₂Fe₂₆Mo₁C₂ thin film had the following properties: B_s = 1.8 T, H_c = 1.6 Oe, ρ = 129 μΩcm.