Electrodeposition of Laminated High-Bs CoNiFe Alloys by Current Density Modulation

Abstract

We demonstrate that high-Bs laminated CoNiFe alloys with improved soft magnetic properties can be deposited by plating current density modulation in a single plating bath. The laminated material consists of high-Bs CoNiFe layers with bcc crystal phase and thinner intermediate layers of softer CoNiFe with mixed fcc + bcc crystal phase. The electrodeposition method presented here offers advantages for laminated magnetic alloy fabrication over the use of multiple plating cells. These include simple plating hardware requirements and elimination of the risk for corrosion due to multiple substrate transfer steps.