Magnetization switching and thermal stability of CoCrPtB/CoDy composite perpendicular layer

In this article, the magnetization reversal process and thermal stability of perpendicular coupled film glass/Ti 40 nm/CoCrPtB 35 nm/CoDy 20 nm/Ti 4 nm were presented. The exchange coupling constant with Dy content near the compensated point is as high as 1.3 erg/cm2. The dependence of exchange coupling strength on the Dy content and the thickness of CoDy layer was investigated. The thermal stability of the coupled films showed an increase over 100%.