Micromagnetic Simulation of Recording Media and Magnetoresistive Heads
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概要
- 論文の詳細を見る
A three-dimensional micromagnetic simulation using the Landau-Lifshitz-Gilbert equation was performed for thin-film magnetic recording media and magnetoresistive (MR) heads with soft adjacent layers (SAL). For recording media the simulation results for magnetization curves and media noise were compared with the results of experiments. Although the media model needs to be improved, the qualitative agreement between simulation results and experimental results shows that this micromagnetic simulation can be a useful tool for analyzing and predicting magnetic properties and recording characteristics. This work also showed that media noise is influenced by magnetostatic interaction, and that the decrease of the magneto-static interaction is favorable for obtaining a high signal-to-noise ratio. For an MR head the output obtained with a nonuniform sense current distribution is similar to the output obtained with uniform sense current distribution for both low and high anisotropy fields (H_k=2 Oe and 10 Oe) SAL. With the low H_k SAL, however, the asymmetry of the output obtained for nonuniform sense current differs from the asymmetry obtained for uniform sense current ; the difference is due to a magnetization vortex in a biased state in the SAL. With the high H_k SAL, the difference between the asymmetry obtained for nonuniform sense current and the one obtained for uniform sense current is not large ; no vortices are found in the SAL at the biased state.
- 社団法人電子情報通信学会の論文
- 1995-11-25
著者
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YOSHIDA Kunio
Department of Mechanical Sciences and Engineering, Tokyo Institute of Technology
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Yoshida Kunio
Department Of Electronics Information And Communication Engineering Osaka Institute Of Technology
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Yoshida K
Renesas Technol. Corp. Itami‐shi Jpn
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Yoshida K
Department Of Electronics Graduate School Of Information Science And Electrical Engineering Kyushu U
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Yoshida K
Osaka Institute Of Technology
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UESAKA Yasutaro
Central Research Laboratory, Hitachi Ltd.
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YOSHIDA Kazuetsu
Central Research Laboratory, Hitachi Ltd.,
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Fujimoto Kazuhisa
Central Research Lab., Hitachi Ltd.
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Konishi Yusuke
Division Of Electric Electronic And Information Engineering Graduate School Of Engineering Osaka Uni
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Konishi Yusuke
Department Of Mechanical Sciences And Engineering Tokyo Institute Of Technology
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Fujimoto Kazuhisa
Central Research Lab. Hitachi Ltd.
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Uesaka Y
Central Research Lab. Hitachi Ltd.
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Uesaka Yasutaro
Central Research Laboratory Hitachi Ltd.
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Yoshida Kazuhisa
The Corporate Quality R&d Center Of Matsushita Electric Works Ltd.
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Uesaka Yasutaro
Central Research Lab., Hitachi Ltd.
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