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Journal of Applied Physics : CoCrPt-oxide based perpendicular recording media with hybrid soft magnetic underlayers

By S. N. Piramanayagam, K. Srinivasan, R. Sbiaa, Yan Dong, and R. H. Victora

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Book Id: WPLBN0002169406
Format Type: PDF eBook :
File Size: Serial Publication
Reproduction Date: 18 November 2008

Title: Journal of Applied Physics : CoCrPt-oxide based perpendicular recording media with hybrid soft magnetic underlayers  
Author: S. N. Piramanayagam, K. Srinivasan, R. Sbiaa, Yan Dong, and R. H. Victora
Volume: Issue : November 2008
Language: English
Subject: Science, Physics, Natural Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Journal of Applied Physics Collection
Historic
Publication Date:
Publisher: American Institute of Physics

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Piramanayagam, K. Srinivasan, R. Sbiaa, Yan Dong, And R. H. Victor, S. N. (n.d.). Journal of Applied Physics : CoCrPt-oxide based perpendicular recording media with hybrid soft magnetic underlayers. Retrieved from http://hawaiilibrary.net/


Description
Description: Writability of magnetic recording media with high anisotropy constant (Ku) is one of the major challenges encountered in extremely high density recording. A possible avenue to improve writability in perpendicular magnetic recording is to reduce the spacing between the writing head and the soft magnetic underlayer (SUL) or head-to-keeper spacing (HKS). A hybrid layer structure for reducing the HKS between the SUL and the writing head is investigated. The proposed structure makes use of a crystalline SUL with in-plane anisotropy together with an amorphous SUL to form a hybrid SUL (H-SUL). The H-SUL design helps to achieve better surface smoothness, thinner HKS, and good c-axis dispersion for the recording layer while still maintaining small and exchange-decoupled grains. Micromagnetic simulation demonstrates that the H-SUL scheme helps in improving writing field effectiveness and increasing field gradient along down-track and cross-track directions.

 

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