Micro Recording Performance Fluctuation and Magnetic Roughness Analysis : Methodology and Application(Special Issue on Selected Papers from the 4th Asian Symposium for Information Storage Technology)
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概要
- 論文の詳細を見る
As technology moves at an annual area density increase rate of 80-120% and channel density moves beyond 3, micro-fluctuation of media recording performance and the homogeneity of media's recording capability become serious reliability concerns in future high density magnetic recording systems. Two concepts are proposed in this work for the characterization of the micro-recording performance fluctuation at high bit and channel densities:recording performance roughness analysis and dynamic magnetic roughness analysis. The recording performance roughness analysis is based on an in-situ measurement technique of the non-linear transition shift(NLTS). Relationship between the performance roughness and the roughness of dynamic magnetic parameters are studied. Results of experimental investigations indicate that the NLTS based performance roughness analysis can reveal more details on media's recording capability and the capability fluctuation-the macro and micro fluctuation of recording performance. The dynamic magnetic roughness analysis is read/write operation based and can be used to characterize the macro and micro fluctuation of media's dynamic magnetic properties. The parameters used for the analysis include media's dynamic coercivity and the dynamic coercive squareness. Here, "dynamic"refers to the dynamic performance measured at MHz frequency. The authors also noticed in their technology development process that further methodology development and confirmation are necessary for media's dynamic performance analysis. Therefore, the work also extends to the accuracy analysis of the playback amplitude based methods for the analysis of the dynamic coercive squareness and dynamic hysteresis loop. A method which is of smaller testing error is identified and reported in this work.
- 社団法人電子情報通信学会の論文
- 2000-09-25
著者
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Zhang W
Institute For Materials Research Tohoku University
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Liu Bo
Data Storage Institute
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Liu Bo
Data Storage Institute 5 Engineering Drive
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Zhang W
Data Storage Institute
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Zhang Wei
Data Storage Institute
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Liu B
Data Storage Institute 5 Engineering Drive
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HU Sheng-Bin
Data Storage Institute
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Zhang W
National Institute For Radiological Protection Chinese Center For Disease Control And Prevention
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Liu B
Data Storage Institute
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Liu Bo
Data Storage Institute 5 Engineering Drive 1
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Liu Bo
Data Storage Institute National University Of Singapore
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Zhang Wei
Coll. Of Life Sci. Northwest Univ.
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