Abstract
Amorphous LRE-TM SmCo perpendicular magnetic film provides a promising candidate for perpendicular magnetic recording media.1 In order to improve the magneto-optical properties of SmCo films, we have studied the ternary system: Smy(Co100−xDyx)100−y films which were prepared by rf magnetron sputtering system. Because the Dy moment is antiferromagnetically coupled to the Co moment and Dy has a larger magnetic anisotropy, Dy addition will increase Ku and decrease Ms of LRE-TM films. With the Dy addition content increased from 0 to 10 at. %, the perpendicular anisotropy constant K⊥ (K⊥ = Ku(K⊥=Ku− 2πM2s) increased to improve the magneto-optical properties of SmCo films. The torque curve measurement and Kerr hysteresis loop of SmCoDy film had proved it was perpendicular magnetic film. In order to prevent RE metal selective oxidation of SmCoDy films, a protective layer AlN was used. AlN films were prepared by rf reactive sputtering.2 The temperature dependence of AlN/SmCoDy/glass were studied. Hc decreased rapidly when temperature increased while its Kerr angle decreased slightly. When the sample was cooled to room temperature, Hc and θk returned to its original value. The results show SmCoDy films may become new material of magneto-optical recording media. The long-term stability and microstructure of SmCoDy films have also been studied.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.