Fabrication and Testing of Exchange Coupled Composite Media by Weikang Shen, Ph.D. candidate, Department of Electrical and Computer Engineering, University of Minnesota
Magnetic recording industries are now switching from longitudinal magnetic recording to perpendicular magnetic recording (PMR). However, due to new issues related to perpendicular magnetic recording, such as writability of recording head, side track erasure problem, and switching field distribution, the attainable recording density may be limited to 500 Gbit/in2 for PMR, which will be reached near the end of the first decade in this new century. In order to maintain a continuous growth of areal density, new approaches are required. Recently, we proposed exchange coupled composite (ECC) media to address above problems [1-2]. In this talk, I will first report our recent effort on ECC media using traditional CoCrPt-SiO2 alloy, which is being used in the first generation PMR hard disks, to fairly address the advantages of ECC media in disk level. Then I will present the fundamental magnetic properties of ECC media including the switching mechanism and thermal energy barrier.
[1]. R. H. Victora, et al, IEEE Tran. Magn. 41, 537 (2005)
[2]. J. P. Wang, et al, Appl. Phys. Lett. 86, 142504 (2005)
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