CoNiP Perpendicular Magnetic Recording Medium Electroless-Deposited from Single-Complextant Bath at Room-Temperature

抄録

  A new electroless-deposition bath for the preparation of CoNiP perpendicular magnetic recording media was developed and the magnetic and structural properties of the deposited films were characterized. The bath contains only four chemicals with diluted compositions, and can be operated at room temperature. In spite of such a simple condition, the films deposited from this bath show superior characteristics than those of conventional CoNiP perpendicular media; the high perpendicular coercivity up to 2500 Oe and c-axis perpendicularly oriented hcp structure with clear orientation. The in situ scanning tunneling microscopy observation of the film was performed, confirming the applicability of this bath to various in situ analyses for studying its electroless-deposition process. Such a simple deposition condition also has merit for easy fabrication of the media, thus being quite beneficial from both scientific and industrial viewpoints.