Seedlayer and preheating effects on crystallography and recording performance of CoCrPtB perpendicular media

• Published in: IEEE transactions on magnetics Vol. 38; no. 5; pp. 1979 - 1981
• Main Authors: Min Zheng, Choe, G., Johnson, K.E., Lan Gao, Sy-Hwang Liou
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.09.2002; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Coercive force; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Crystallography; Exact sciences and technology; Magnetic properties; Magnetic properties and materials; Magnetic recording; Magnetic recording materials; Magnetism; Perpendicular magnetic recording; Physics; Signal to noise ratio; Soft magnetic materials; Studies of specific magnetic materials; Thermal degradation; Thermal stability; X-ray scattering; Ta SL; Ruthenium; Subshell; Experimental study; Cobalt; Crystallography; Ru UL; Magnetic thin films; Magnetic force microscopy; Sputtering; Thermal stability; Thin films; Tantalum; Perpendicular recording; Granular materials; Coercive force; Recording material; Property structure relationship; Preheating; Magnetic recording; Crystal structure; granular media
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2002.801792

The effects of seedlayer (SL) and preheating on the crystallographic, magnetic, and recording properties of CoCr/sub 18/Pt/sub 16/B/sub 4/ granular perpendicular magnetic media have been investigated. For the media with Ru as underlayer, although higher preheating improves both coercivity and squareness, the media is much noisier. With introducing Ta SL, Ru (0002)/Co (0002) crystallography is greatly enhanced. High coercivity, unity squareness, and negative nucleation field are achieved even at low preheating without degrading signal-to-noise ratio. In addition, the media is magnetically stable for a wide range of recording density.