Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1802655 | Journal of Magnetism and Magnetic Materials | 2006 | 5 Pages |
Abstract
Pd nanocluster seeds were formed on a soft magnetic underlayer (SUL) using an electrochemical substitution reaction, and were utilized as an intermediate layer for a Co/Pd multilayered ([Co/Pd]n) perpendicular magnetic recording medium. A CoNiFeB film prepared with electroless deposition was used as SUL, which was immersed into a PdCl2 solution for the formation of Pd seeds. The Pd seeds were found to effectively reduce the size of magnetic domains in the [Co/Pd]n film deposited on them. The optimization of the concentration of the PdCl2 solution and the use of the pretreatment process with a SnCl2 solution were effective to obtain the smooth SUL surface with fine Pd seeds as small as 5Â nm. The 20Â nm-thick [Co/Pd]n film deposited on the optimized Pd seeds/CoNiFeB SUL exhibited a high coercivity of 7.8Â kOe and a small magnetic domain size of 69Â nm. These results indicated that the combination of the Pd seeds and the electroless-deposited SUL was desirable in terms of the improvement not only in the magnetic properties of [Co/Pd]n media but also in the mass productivity of the underlayer.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Jun Kawaji, Koji Kimura, Toru Asahi, Takayuki Homma, Tetsuya Osaka,