Instability of Output Signals and Its Relationship with the Domain Structure in MR Heads
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- Nakamoto K.
- Central Research Lab., Hitachi, Ltd.
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- Kawato Y.
- Central Research Lab., Hitachi, Ltd.
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- Fukui H.
- Central Research Lab., Hitachi, Ltd.
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- Miyamoto N.
- Data Storage & Retrieval Systems Div., Hitachi, Ltd.
Bibliographic Information
- Other Title
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- MRヘッドの波形不安定性と磁区構造
- MR ヘッド ノ ハケイ フアンテイセイ ト ジク コウゾウ
- MRヘッドの波形不安定性と磁区構造 (<特集>磁気ヘッド・磁気記録再生特性)
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Abstract
Instability is studied for an SAL-biased MR head with abutted permanent magnets. An MR head with insufficient longitudinal bias is simulated by demagnetizing the permanent magnets. The values of the output and the peak asymmetry fluctuate between two states, one with high output and small asymmetry, and the other with low output and highly negative asymmetry. In the low output state, microtrack profile measurements taken while varying the value of the sensing current show the MR layer to be in a buckling domain structure. This causes a hysteresis in the output versus sensing current curves. The buckling domain structure can be changed into a single-domain structure by increasing the sensing current above a certain level. This brings the head back into the high-output state.
Journal
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- Journal of the Magnetics Society of Japan
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Journal of the Magnetics Society of Japan 21 (4_2), 257-260, 1997
The Magnetics Society of Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390001205092757632
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- NII Article ID
- 110002809859
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- NII Book ID
- AN0031390X
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- ISSN
- 18804004
- 02850192
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- NDL BIB ID
- 4192911
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- Data Source
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- JaLC
- NDL
- Crossref
- NDL-Digital
- CiNii Articles
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- Abstract License Flag
- Disallowed