Enhancement of magnetic properties of Co/Pd multilayered perpendicular magnetic recording media by using Pd/Si dual seedlayer |
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| Institution: | 1. School of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan;2. Advanced Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan;3. Akita Research Institute of Advanced Technology, 4-21, Sanuki, Araya, Akita 010-1623, Japan;1. Institut d''Electronique, de Microélectronique et de Nanotechnologie (IEMN), UMR CNRS 8520, Avenue Poincaré—BP 70478, 59652 Villeneuve d''Ascq Cedex, France;2. Centre de Recherche en Technologie des Semi-conducteurs pour l''Energétique-CRTSE 02, Bd Frantz Fanon, BP. 140, Alger 7 Merveilles, Algeria;3. State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 3888 Dong Nanhu Road, Changchun 130033, China;4. Laboratoire de Physique Quantique et Systèmes Dynamiques, Département de Physique, Université de Sétif, Sétif 19000, Algeria;1. IEK-5 Photovoltaik, Forschungszentrum Jülich, D-52425 Jülich, Germany;2. Institute of Materials Science, TU Darmstadt, D-64287 Darmstadt, Germany;3. Evonik Industries AG, CREAVIS – Science to Business, D-45722 Marl, Germany;1. School of Materials Science and Engineering, Yunnan University, Kunming, China;2. National Engineering Laboratory of Vacuum Metallurgy, Kunming University of Science and Technology, Kunming, China;1. Ministry of Science and Technology, Baghdad, Iraq;2. Department of Science, College of Basic Education, Mustansiriyah University, Baghdad, Iraq;3. Department of Applied Science, University of Technology, Baghdad, Iraq;1. Department of Physical and Colloidal Chemistry, Tomsk State University, 634050 Tomsk, Russia;2. Department of Organic Chemistry, National Research Tomsk Polytechnic University, 634030 Tomsk, Russia |
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| Abstract: | Effects of the introduction of a Pd/Si dual seedlayer on the microcrystalline structure and magnetic properties of Co/Pd]n multilayered perpendicular magnetic recording media were investigated. The Pd/Si dual seedlayer was composed of a Pd upper seedlayer and a Si under seedlayer. The Pd upper seedlayer with a thickness of up to 10 nm markedly increased the coercivity of Co/Pd]n multilayered media in the direction perpendicular to the film surface. The highest coercivity of 7.8 kOe was obtained for the Co/Pd]10 medium with a Pd (10 nm)/Si (100 nm) dual seedlayer. The Pd upper seedlayer not only facilitated the formation of regular interfaces between the Co and Pd layers, but also reduced the thickness of the deteriorated initial layer in the Co/Pd]n multilayer, resulting in enhancement of the magnetic anisotropy field. The Co/Pd]n multilayered medium with the Pd/Si dual seedlayer exhibited weak intergranular exchange coupling between Co/Pd]n grains, which led to excellent read–write characteristics. |
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