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The thermal decay for small grain sized media has motivated the use of antiferromagnetically coupled (AFC) longitudinal media in order to extend the superparamagnetic limit. AFC media show improved magnetic recording properties, e.g.,an S(sub 0)NR increase and PW50 reduction, compared to conventional media. Such improvements are strongly affected by microstructure of the film.

Lamination of multiple isolated magnetic layers has been shown to be an effective method to significantly increase signal-to-noise ratio in longitudinal media. These laminated media, however, are accompanied by low overwrite and wide magnetic pulse width, mainly as a result of poor writing of the bit transitions in the magnetic layer further away from the head and an offset in the transition position in the multiple magnetic layers resulting from head field spacing loss. We have demonstrated that the transition writing and transition alignment in the multiple magnetic layers of the laminated antiferromagnetically coupled (AFC) media can be optimized by adjusting the magnetic anisotropy of the relevant magnetic layers to compensate for the reduction of the head field magnitude with spacing. Such optimization results in significant improvements in media recording performance, leading to successful application of this medium technology. In this paper, we will highlight some of these improvements and discuss our approaches to further improve the recording performance by reducing the thicknesses of the magnetic layers and the lamination spacer layer in the laminated AFC film stack and by introducing additional elements in the magnetic layer. [ABSTRACT FROM AUTHOR]

We reported the comprehensive treatment of an elderly critically ill patient with pelvic fracture.The functions and quality of life of the patient were recovered after collaborative nursing by both family and hospital according to the general practice principle of both mental and physical rehabilitation.We summarized the diagnosis and treatment strategies of this case,aiming to provide reference for the clinical treatment of such cases.

The original version of this article unfortunately contained a mistake. In p.590, the address of Yan-li ZHANG, one of the corresponding authors, is incorrect. The correct address should be: 1Department of Gastroenterology, China-Japan Friendship Hospital, Beijing 100029, China.