Materials for magnetic recording

Elongated iron particles may be superior particulate materials for magnetic recording media, but the problem associated with corrosion has not been completely overcome for long storage time. 

Since iron has a large saturation magnetization of 216 emu/g, it must be one of the best materials for magnetic recording media. Although iron particles were the first particulate materials employed for tapes, they were not used after the... 

The optimal material for magnetic recording media was, for many years, y-FejOs (maghemite). This form of FejOj, which has a defect-spinel crystal structure, can be prepared as small, elongated particles. The coercive field is produced within the required range by shape anisotropy (see Section 4.5.1). The process used to prepare small particles of... 

Due to their impact on information storage technology, a brief account of materials for magnetic recording media and heads is presented. Materials for magnetooptical recording are also discussed. 

The importance of the substrate to the deposition of carbon materials was also found by Lamberton et al [63] in their investigations on the ion beam decomposition of amorphous hydrogenated carbon. Nanocrystallites of graphite were deposited on silicon but not on alumina-titinium carbide. Alumina-titanium carbide has been commonly used as slider material for magnetic recording. 

Also surface optical properties of a material sometimes need to be changed, for example in making anti-reflection coating for lenses or reflective surfaces for CDs, the magnetic properties may need to be influenced as in the case of giving a ferroelectric surface to a plastic for magnetic recording, and, perhaps most extensively of all, the surface electrical properties need to be controlled in microelectronic devices used in computers and all modern electronic equipment. 

Owing to their anticorrosive properties TPs (e.g., 205) serve as rust inhibitors in lubricants for magnetic recording materials (95JAP(K)07/65352) or in chemical-mechanical polishing systems (02JAP(K) 134442). 

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